Speedometer round plug need jumpered to get power w/aftermarket gauges???

No Nothing at the cluster connector

What you need to jumper is the large ammeter wires, they are red and black, quite large, and the only two with eyelet terminals.
I found those and was using them as my power and ground for my holley gauges. I still dont have power to the lights or cranking power. With the dash unplugged...wonder what else um missing then.