I have two seat element pad sets(cushion/back). The back and cushion of each set are connected to there own relay via a plug . From each relay are four more wires red black green brown (pos-neg-heater-heater). How are the wires from the switches connected to the heaters relay and car?

 

Moved your post to the correct forum to ask questions.

I'm confused by your post. You have the OEM wiring diagram, so the diagram is showing one relay that powers all seat heaters (driver's and passenger). Is the question why do you have two relays? Does your car have some kind of aftermarket seat heaters installed?