I'm new here and not sure if this has been discussed recently but I don't know what I'm doing.
I have a 2001 F150 4x4 Lariat Edition with power bucket seats. Today I had to go to the salvage yard to replace my passenger seat. The only thing they could find was an Excursion seat (year unknown) which is also power. The bolt pattern was perfect. Here's the problem...I have a small wiring harness with 3 wires. Red, Red/black, Blue/white coming out of my floor. The Excursion however has three harnesses and a bazillion wires. Are there matching wires in that mess I can put through a seperate harness that will click into my truck's existing harness? I'm including pictures if I can figure out how to do that.
Any help would be great! Thank you!

This is my factory harness.

Again the factory harness.

The mess under the seat...