You'll need a Polarotor II Motor, it only has 2 wires ( good luck ) in order to use that 2800A Box. I had one of those boxes last year to play around with. Couldn't get it to work the 3 Wire Polarotor motors, so off to the Goodwill Box it went.
Below is a pic of the wiring diagram...NOTE the 2 Wire Polarotor II ( 3,4 connection );
I swapped out a few of those polarity motors BITD. Upgraded whole systems to a Toshiba IRD. Think the servo can be 'gutted' of the electronics and then run the two motor wires out. (Seems I saw this on the net somewhere)
When gutting the servo electronics, servo position feedback is no longer active. There will be no reference confirmation for the positioning of the probe. You will just need to more aware of the install position in relation to the counter. Likely will find that when the power is interrupted or removed the two will lose reference and require re-sync.