How to wire in a dvd player?!

Hey guys, new here, but I was wondering if anybody could help!

I just bought a 2003 range rover vogue with sat nav etc in the front. The front sat nav screen has signal and plays terrestrial tv (a bit fuzzy, but it works none the less)

The car has 2 TV screens in the back headrests, but the previous owner has taken them out.

I was going to buy 2 new screens off ebay which come with a DVD player but no wires.

There are connectors coming out of the back of the headrests i presume to plug screens into.

However, if I did get the new screens, how would i play DVDs? where does the DVD player plug into?

Any help would be GREATLY appreciated.

Kind Regards

Jamie

Mine is mounted behind the lefthand panel in the boot. As for wiring can't help was in when I bought it but if its had them previous the wiring maybe there,hope this helps