Starting motor on stand wiring help

distributer grounds to the block, the wire on the distributor for points only goes to the negative side of the coil. On electronic there is a two wire connector that ties in with the ecu wire harness etc. I know the ecu has to be grounded so run a jumper wire from that to the block. on the car it isa grounded through the bolts, but I actually run a jumper wire from my ecu lower bolt to the back of the right cylinder head.

this might help...page 17 is the wiring diagram for MP electronic distributor. https://wawii.com/m37/manuals/MoPar Electronic Ignition - elecignconv.pdf