What is this bumper plug for?

[ZFORCE]

So I am mounting the antenna for the keyless entry in the bumper I believe the correct plug is the one on the left Circled in Red, because it is two wire, but there is another plug on the right, 4 wires, does anybody know what it is for Circled in White, just curious?

Maybe @ Jimmy07

 

[CdnHO]

Trailer TPMS receiver.

 

[ZFORCE]

Thank you, I was wondering what other options there would be on the bumper!