Each gauge had a blank hole that, when drilled out, was perfect for the 4mm bolts we used for the electrical contacts.

The holes were even a perfect distance from the edge so that the flat side of the hex head was against the side of the gauge housing, keeping it from spinning as we tightened the connectors under these nuts.       Except for the high-beam light, these warning lights have power all of the time & only light up when the sender causes the negative wire to go to ground.  To avoid having to run separate power wires, a

wire was soldered to the regular power connector and run to the nut on the left side of this picture (why didn't we just solder the positive light wire directly to the powered connector? - DOH!)

Hayden gets busy on the wiring.

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