Thanks probably not available in uk probably find something similar though. Some folk use lithium grease .Looking for 1601 M3 a liquid spray only available online .This lube is what we use for all electrical connections at work, to be noted that you do not put it on the actual wires / conductors inside the plug, but on the O-ring/ seal / gasket/ IP washer etc. Good stuff !!
Personally I use it on my seat post dropper after every ride, Only a really thin layer though
View attachment 77313