Do we have a resident electronics/wiring guru here?

The heated seats come with the switches pre-wired. Do you mean how did you hook up power to their harness?

If that is what you are asking then you just hook up positive to positive and negative to negative. You can even find the matching water resistant factory plug to make it look like it was professionally done.

You are going to have to be careful with riding gear. I would definitely not stack the heated seats and the riding gear on that circuit under the seat. The wiring isn't gauged for that. Run the heated gear to the battery and use their supplied chart to select the proper fuse for how much gear you are running.