Connecting a SuperJack QARL 3024 actuator

I purchased a used Superjack XL Ballscrew QARL 3024 actuator and I have no manual for it. I want to use my old Uniden UST-4500 analog receiver to control the actuator. Upon checking the wiring harness in the actuator box I see that it has 5 wires coming out of it connected as follows....
1) A heavy green wire to one connector
2) A heavy red wire to second connector,
3) Two heavy white wires to a third connector
4) A thin gray wire to a fourth connector
5) A thin black wire to a fifth connector

On the back of my Uniden receiver it shows + and - 24 volts out, one send and one ground. I am planning on connecting the Uniden as follows...

A) + 24 volts from the Uniden to connector 2 (heavy red) above
B) - 24 volts from the Uniden to connector 3 (two heavy white wires) above
C) Send from Uniden to 4 (thin gray wire) above
D) Ground from Uniden to 5 (thin black wire) above

I think it doesn't matter if send and ground get mixed up. Am I correct? Also, does the thick green wire (#1 above) in the actuator get connected to anything. I am assuming that this green wire is ground but it doesn't make sense to me for that green wire from the actuator harness to be connected to nothing.
Finally, when I opened the wiring harness box on the actuator I discovered that they little round magnet that is used for counting the turns of the motor was shattered. I ordered a new magnet which should be here in a couple of days. My question is (since I have no manual) how the magnet should be installed. Should it be blue side out or blue side facing in? Does it make any difference?

SuperJack QARL 3024, more questions about wiring and magnet

Actually, there is a diagram inside the cover but it doesn't include the green wire. I guess I'll just leave it there and connect it to nothing. I appreciate the offer of the magnet but since I already had one shipped, that should fix me up. I assume that the 24 volts on the Uniden should be sufficient to power the 30 volt SuperJack. Is this correct?
Finally, I do have one more question about the thin gray wire (#4) that runs from the circuit board where the magnet sensor is mounted to the wiring harness. This wire is currently positioned between the magnet sensor and where the magnet should be (see attached image). Maybe it doesn't make any difference if it is between the magnet and magnet sensor, but I just wanted to make sure. I can pull the wire around and make it go behind the circuit board, leaving the space between the magnet and the magnet sensor empty. Any ideas about what would be best? I would assume that if the wire is threaded between the magnet and the magnet sensor, it runs the possibility of rubbing on the spinning magnet.
Anyhow, now that I'm looking closely at the connections, I think I'm beginning to understand a little better. I can see both the gray and black wires come from the magnet sensor. These are the two wires that will have to connect to the back of my Uniden to tell the receiver how many turns of the motor have occurred.

Help! Superjack - Used.. you get what you paid for

I replaced the broken rotating magnet on the used Superjack actuator that I purchased and my Analog Uniden UST-4500 receiver actually does make the dish turn. Unfortunately, I think the magnet sensor is bad. The actuator works for about two seconds and then stops. The receiver says that there is an actuator error. If I push the button on the remote control to turn the dish again, it does the same thing. I connected a volt meter to the two leads coming out of the magnet sensor and it indicates 10.8 volts and it doesn't change when I turn the dish. I don't know if it is supposed to change or what it's supposed to do. So, I have two questions...
1) How do you test a magnetic sensor for proper function?
2) Where can I get a new magnetic sensor
Thanks for any help!!