At the moment I have the car stripped down with all the left side looms accessible - I am adding the Satnav loom as mentioned and wiring
for reverse camera & switching relay for the reverse polarity box. Then once in I shall be assembling the lot and installing the new Head
unit.

 

if its from another car if i remember you have to add two wires the scp network wires ,ill get back to you if i can find my notes

 

I have previously purchased the following is this to which you refer -7
Jaguar X-Type S-Type ISO Wiring Harness Lead Loom Connector Adaptor XJ6 XJ8
I think this completes the after-market loom connection between
pins 11 & 8 at harness termination left side to radio plug at the head unit - ???