What is this relay connector for?

[Rtlane]

I found, what looks like, a relay connector under the dash with no relay attached. It’s under the drivers side dash in the left corner. What is it for?

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[Nad_Yvalhosert]

It's for a module that's not necessary for your truck. Manufacturers do that, one fully equipped harness, but the truck is ordered without an up-level stereo, or has crank windows, or 2wd (but the under dash harness has 4x4 connectors) Being near the left kick panel, I suspect it may go to the door pass-through boot.
Dont worry about it.