2011 r series highline ex stobarts

Just been given one of these to drive and it has had a fridge freezer bolted in from one of our old 56 plates, this was never wired in just wondering if the loom will be here taped up somewhere or if it’s an auto elec job.
The fridge has the wiring on it just a red and a black leading to a 2 pin white connector.
Can anyone please shed any light.