More work on wiring up the back of the top panel, LED's, gauges, etc.
Soldered the +12v and ground leads from the gauges and LEDs to 16 gauge wires with ring terminals on the other end connected to the screw terminals of the digital engine tach then ran another wire from the tach terminals out the bottom of the panel to be terminated in a 9 pin connector that will connect to the lower panel and the various senders and switches.
Used two 3 pin connectors for the 5 LEDs and the aux battery lead to the voltmeter. Installed the connectors using one female and one male so they can only be connected one way.
Routed and tied all the wires to make it look somewhat organized.