Darrel, okay, that's cool with the wiring and the aftermarket motor. Okay, after reading your first, I finally realized you have the 3 speed heater motor. (The dots are only for spacing, so the diagram will appear correct).
Heater motor ----black wire------fuse box
Heater motor ----orange wire to *single terminal
(below the "three" terminals on the resistor/heater case).
............... _T_
............. L | | R Is this the correct orientation/position of the resistor terminal?
................. _
.................. *single terminal
resistor top terminal-----------"med speed" switch position terminal
resistor left terminal------------"low speed" switch position terminal
resistor right terminal----------"high speed" switch position terminal
I think the wires behind and on the heater switch are soldered in. You make have to splice in to them or, un-solder them and solder your new wiring in. I'm pretty sure I have it right. I checked 3 times. Make sure you check your new wiring harness and directions and compare if this makes sense. (I'll be up for another hour, (22:38 here now GMT), to answer any other questions you might have. I'm sure you can't wait to get your new wiring installed and get back in the saddle.