What would this be?

From the build sheet on my '98XJ:

SALES CODE LIST
Code: 5CD Description: Rear Seat Video

Personally, never heard of "Rear Seat Video" in a 98 vehicle... maybe it explains the odd-ball switch where the fog lite switch normally goes? I replaced the carpet and found no connectors anywhere, no signs of any hangers, mounts, etc..

Don't trust your build sheet to be 100% accurate. Mine states that I have rack and pinion steering. So it is probably a gremlin in the computer that spits out the information.