Sat Nav 3.6 H.S.E 56 Plate Range Rover

My car is not fitted as standard with sat nav. Ive aquired all the bits I think I need, But wheres the connectors for the main dvd unit do they come from the main loom or, as I hope off some other unit i.e the hardon karman unit which has two spare sockets the right shape ish?? Any body got a vouge to check would they peer into the back near side cubby an have a sqink cheers.