Where does/should BDR ground ? Car won't start

[Ozzie Goat]

My car just stopped running. About three weeks ago now.

I have air (carb) and fuel (squirts, and can smell when cranking); what I don't seem to have is spark.

I have 11V at red wire in to MSD, and 8-9V when cranking.
The trickle charger reads full when the battery has 11-12V.

I'm about to verify continuity for wires to +/- for the (new) coil, and for the distributor trigger green/orange (the pickup is new). That's still to-do

The wiring used to work a month ago, but I'm trying to think of everything.

The power-in to MSD starts at the battery, and the ground wire connects to the battery.

The battery grounds to the roll-bar that bolts to the frame.
IS there another important ground for the engine etc ????
I just need a couple more things to check. Help my understand how a BDR grounds.

I don't seem to get spark OUT of the coil. I stick a screw driver in the coil wire and place it by the frame. I get no spark when jumping the trigger wire.


OH, one more thing. It did fire right up one day during this process, but would not restart. YESTERDAY I got spark and she went to start, but hasn't fired since.