I have bought some female jacks off ebay, similar to this
http://www.maplin.co.uk/Module.aspx?ModuleNo=1148, but it is plastic instead.
I can see two contacts (i think one branches into 2 so i counted that as one) if i look deep in the hole, but how do i solder into the jack without cutting it open?
I presume that I want to buy this product (out of the available) on your link:
1A DPDT 5Vdc N05AW £1.91
seeing as it is 5Vdc?
And I forgot to ask, next to the box labelled 5v relay, I see there is a diode in parallel, do I add that? or is that part of the relay?