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I will post photos once I download them from my phone if you need them. The following is my wiring color coding" Common bus: orange +12VDC: purple -12 VDC: Brown Control wire from SPST: Blue On my club module I used +12VDC, -12VDC and ground.  I ran the common bus wire to contact 1 or 8 on both motors depending on how each motor is oriented.  The common wire goes back to the 12VDC power supply common terminal.  I then ran a control wire between the 2 motors on the unused contact 1 or 8 (blue wire).  The blue wire then goes to the center contact on a SPST switch.  +12VDC and -12VDC is connected to the other 2 contacts on the SPST.    Essentially this is the diagram 2 method of wiring Circuitron reccommends, without the second SPST.  It works just fine. Circuitron says you can either use the aux contacts or the main power.  The aux contacts are probably the best option because you can dial in the voltage from the aux contacts without affecting anything else.  Here is the circuitron tech note: <a href="http://www.circuitron.com/index_files/AN/an-6000-02.pdf">http://www.circuitron.com/index_files/AN/an-6000-02.pdf</a>
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