Before we all go off half-cocked and get too upset about this . . .
Nobody in their right mind would sell you a 36" dish, a motor, and a
circular LNB.
Please give us some links to the LNB(s) you have coming.
The dish, too, if ya like.
Even the motor.
We can probably find you info to study now, to get you ready to hook up your equipment when it arrives.
AND, if by some small chance, you don't have a proper LNB in the incoming shipment, we can help you figure out what you'll need, and get that ordered.
hint: if you plan to run two receivers (only) then two-output LNB would be required.
Exactly which one, is to be determined.
So, don't have a cow. -

You'll be watching TV in no time!