I pulled my factory soft top last summer. The side and back windows are gone and I plan to turn the header and fabric into a summer bimini top. Any parts of the frame and hardware are up for grabs. Cheap. 2012 JKU
Pretty sure it's 12V power for an outlet that some subwoofers have. Some JKs(yours) have the wiring, some don't(mine). Theres a lengthy thread on another forum about it. Runs off of fuse M7 in the engine bay fuse box.