Towing w/DiscoII

Hopefully someone can give me some guidance on this one!

I have an '04 Disco with the dealer installed trailer wiring package (with the Euro style 7-pin receptacle.) Unfortunately, the package came with no literature whatsoever, so I have no clue exactly what I have!

I am wanting to tow a tandem axle camping trailer with electric brakes. I have already figured out that I'm going to have to make my own adapter to go from the Euro receptacle to the RV style plug on the trailer. What I don't know is what else is going to be required to make everything work electrically. Please understand that I have little experience towing a trailer with brakes.

Can anyone help!

Thanks in advance!