Dvd Headrest Wiring?

[chrhec]

I am trying to install replacement DVD Headrests in a 2005 Suburban. The instructions that came with them are a joke. All I believe I need to do is connect black to ground and red to hot. I'd like to tie it in to the rear instrument control (in the rear of the center console that controls radio, source, volume, etc.), but I'm not sure which wires are which.

 

Does anyone have a place to find a wiring diagram for this rear control unit? Any other ideas? Any problems with what I'm trying to do? The DVDs have wireless headphones and an fm modulator built in so all I'm looking for is power.

 

Thanks for any info!