Recently came across and bought and fitted these Bulgin Buccaneer auxillary sockets and plugs for my live well and other accessories on my RB. IP68 rated (for marine applications) with sealing caps fitted with o-rings for when they are not connected. About the sturdieast and best sealing electrical connections I have come across. Can probably also use them for night time running lights or whatever else you need to power up that is not permanent. RS Components supply them and they have lots of different types. They have an online catalogue. They cost round about R60 a piece depending on which configuration you buy.