HEI in Mopar ECU casing

Ok so I can just run a ground wire from that metal insert on the bolt hole of the HEI module and run that to the heatsink portion of the orange box as a ground? How did you attach the HEI module so it wasn't just floating?

Good idea on pulling out the old resistor wire, thank you! What gauge did you run?

Can you verify my points from the HEI module to the orange box are where I need to run the wires?