Which OEM radio do you have? The code should be printed on the front of the unit. You can then look to see where the camera wire connection is located. My camera wires were embedded in the large main connector but each year and model may be different. There are vendors that sell Subaru specific harnesses but need more info.

 

Thanks Subyrubyroo for the reply. my OEM head unit was a Clarion Model PF-3680 with Subaru Part number 86201FJ550. some pics attached,

 

That one you're holding is usually ground. Goes to the left of the connector labeled "4"

 

Thanks MyOtherRideIsUrMom, that at least kills the OCD with having that one cable with no place to go haha!

 

In the USA, the Clarion units for 2017 were either 86201FJ690 or 780. Probably the same wiring as yours just maybe no HD radio or something with the apps being a different country. Can't locate a pinout chart at the moment though.

What kind of harness did you purchase? This guy has a lot of different ones and might be able to at least steer you in the right direction. I added a camera to my car years ago and bought the harness parts from him. Been a long time so can't remember exactly what I did but was on a '14 so a different radio anyway.

Subaru radio and radio wiring harness information

Subaru car radio wiring pin-outs and information and wiring harnesses for sale

ae64.com

 

Backup camera is usually a RCA plug. Do you have one from original?