Seeing as I am off work cos of the bad weather I think I may as well fit my gauges.

I have boost, oil temp and pressure to fit in one of Nomad's 3 gauge holders that sits in the centre vents.

Just wondering how to wire it up so that they light up with the ignition on.

I understand I can use the grey/yellow wire from the radio to do this but is it a case of cutting this wire and fitting into a wiring block to then run wires to each gauge?

Also where is best to connect the earth and positive wires as I don't have a multimeter?