Beacon bar connector

I have floating around in my garage a reconditioned beacon bar that I'm going to fit to my Disco 1.

I'm intending to make it removable as I'm fitting it to roof rack bars and I've been searching the interweb for some kind of weather proof external plug to fit on the roof with approx 10 connections, any ideas?????

A good auto electrican , they should have them . Lucas type plug and socket , come in different types depending on how many wires you need . Goog for all kinds of wiring work , think DURITE make them now .

10 way that will be a big connector better to have two to keep things neat.

These people supply weather proof external plug/sockets connectors.
Vehicle Wiring Products Ltd. Suppliers of auto electrical parts.