hmm, shouldn't matter with inductive coils either way. I've got red (power) plugged into green on both sides since that's only way wires reach on my bike. It's in pieces at moment. Should have back together later and I can test running it both ways.
TEST to verify functionality:
1. spark: pull plug wires and insert spare plug. Ground plug casing on valve-cover and crank engine. Do you get spark on both sides?
2. measure power at coil:
- slide connector on coils 1/2-way off
- key ON
- measure voltage at green-terminal on each coil. Voltage = ??
- measure voltage at black-terminal on each coil. Voltage = ??
3. measure coil ground. Measure resistance between coil mounting-bolt and chassis ground. Ohms = ???
Manual had error with coils going to wrong cylinder. I've fixed it here: