A couple of thoughts - I would use the 180 setting on the PowerMaster for the KW. The A terminal to the center post of PM connector and the U terminal to the bottom post. The top post in the point is not used. If you have the Lionel adapter cable, 6-12893 - A should be the fused link - check for the pin assignments to be sure it's correct.
The Cab1-L base wire connects to the U post on the PowerMaster.
It seems that you have successfully assigned TR#1 to the PowerMaster. The PowerMaster selector switches on the side should be Run and Conv positions.
Many say it doesn't matter, it probably doesn't, but I power the command base first in my startup sequence. Here's mine:
- Base on
- Powermaster On
- KW on with throttle already set at 18 volts
- remote on
- Press TR#1 to address or talk to that device (the PowerMaster)
- Now perform conventional functions - Rotate red knob for throttle -horn button- whistle button - Dir button should cycle e-unit
If it takes too many Red knob rotations to get an engine moving - read the manual to set the speed steps to 32. When you get comfortable , set the stall voltage and speed steps 100 for the conventional engines.
Pages 12, 14, 16 of the manual should get you going