Battery State of Charge unit wiring

[Limbs]

Hi All,
2014 1.6 HDI B9 Berlingo Multispace.

My battery hasn't been charging properly, I did a bit of investigating & I had DTC F066 "No communication with battery State Of Charge (SOC) unit", after a bit more work I found that I have a poor connection on the 12v supply to the battery SOC unit (only 2v with the unit connected, rising to 11v when the unit is disconnected).

Does anyone have or know where I can get a wiring diagram to showing where the 12v feed comes from, please?

[Limbs]

In case anyone else reads this in the future, the unit is fed from a 5 amp fuse located on the fuse board that's mounted on top of the battery cover, my problem was a slightly corroded fuse, I replaced this and cleaned the terminals and all is good.