Tow bar Charge Socket

I have finally got round to wiring my towbar back up. The lights etc... have not been a problem but I'm needing somebody to confirm the wiring for the charging socket. The cable has been run from the rear of the car to the fusebox with only the green and red wires ever having been connected. Looking at photographs of the 'old loom' (The car has been rewired with a loom from a GLT) it appears that the red cable was connected to fuse 12 'air condittionning, windows etc... and the green cable to fue 7 'brake lights' Is this correct? Cheers Scott

That sounds likely to be correct. The fridge normally runs off a permanent live (brake lights) and charging runs of an ignition circuit (air con, windows). Mike

Some more info 

The instructions for the towbar socket are here:

Thanks 

Gents, Thanks for your help yet again! Cheers Scott

got to get a grey socket for mine for charging the trailer tent battery on the move ,is the direction indicator warning buzzer fitted as standard in a volvo?