Wiring in oil pressure and water temperature gauges

[walkinginperu]

I've had a look on the FAQ which has an easy guide to what relay pins do what. What I need to know is how to attach wiring to the back of the fuse box without screwing anything up? I guess i probably want my switched lives to go through a fused pin? And am i splicing wires or fixing to pins at the back of the fusebox? Earths are relatively simple i guess, just attach spade connectors to the collection of earths on the right of the fusebox.

[Boumsong]

Could run them independant of the fusebox and just have an inline fuse in the wire instead. I have a set-up like this for my fuel pump at the minute, works well.