Need wiring schematic f/MTh PS1 DL109 A/B Santa Fe

Why was this in the 3-rail traditional forum when the main topic is about an MTH product?  I moved it to the proper forum.

The Lead unit for PS-1 does not use the switch for powering the Slave.  3 wires go to the slave for motor control assignment via the 4 pin tether.  The 4th is coupler if the slave has it.  The switch on PS-1 include smoke on/off and the coupler selection switch.  PS-1 can only fire one coupler.  You select Front or rear coupler with the switch.  Usually it had arrows pointing.  Smoke was labeled.   

If they upgraded the Lead A to PS-3 you can not run the trail A.  You need to do a PS-3 upgrade to the Trail as MTH did not support Slave PS-3 kits.  Only Slave PS-2.   Non are backwards compatible.  PS-1 to PS-1, PS-2 to PS-2.  PS-32 can work a PS-2 slave, but PS-3 diesel can not.  So pictures to see what you have.  G