I like the CR flywheel, so to have led lights with it might be an ideal rig.
I don't know if I'm more qualified than you to reverse engineer it to find the correct kill circuit. On the trx system, you probably already know that it's the bl/wh wire for either the key or the switch connected to gr, but looks like that doesn't help you here.
On the other hand, if we know how the kill circuit works, I can add the heatshrink, JST (japanese solderless terminal) pins, and connector housings. Currently, I only have oe or oe style housings, so they are white. On the r2 harness I add liquid heatshrink to the crimped pieces as well in the event moisture gets to them and promotes galvanic corrosion between the two metal types, but that's just a nice-to-have.
Let me know what you think, and I'll help where it's useful to you.