RoadTrekker wrote:What you have to look for is_
It is not reversible +/-
Waterproof
Designed to handle the required power load = Amps
Easy to install
Try to get a connecter with an attached cover to protect the connector when not using it.
Also try to get a connector with a click lock so that it cannot vibrate loose which the Trailtech type do.
The wiring is the correct size for the loading = Thickness of the each wire
Try visiting Maplins as they have a good selection of cables and connectors or any good Radio Control model shop, last resort is Halfords.
Those are the factors above that drew me to the AMP/Superseal style connectors. They come in three different colours to support a range of wire sizes while still sharing the same connection size (though for very high loads like regulators etc they're likely to melt - but there's a physically larger and higher rated version in a similar style like those used by eastern beaver available for that sort of thing - just a bit hard to get hold of in the UK but ebay sellers sometimes have them).
If it's just for connecting accessories then the amp connectors should be fine for most things ime. and satnav and phone style things will be no problem.
A quick phone photo of the little blanking cover I made for mine in case my description wasn't very clear:
It means sacrificing a male connector to make one but they're only a quid or so on ebay, and the pins and seals left over are handy as spares.
After connecting the wires, I usually wrap a bit of self amalgamating tape around the connector and wire to add some additional waterproofing and strain relief. Not sure if that's necessary but I haven't had one fail on me yet.
I haven't had much luck sourcing things from maplins in the past myself though. Some of the connection stuff they sell doesn't seem great quality, the range is limited, and is quite overpriced.
There's a better selection of better quality cheaper stuff available online imho.