[flyingsherpa]

Those are coaxial cables, I would assume for XM radio and GPS antennas. No idea what the empty socket is for.

I've taken out my 2013's radio several times, it doesn't have any connectors quite like that. It does have some coax connectors, but they were different... either 2015 changed or those are some aftermarket stuff that has been removed.

OP, does everything work in your car? XM/AM/FM etc?