If you're looking to "try" the coil mod, you can pull the yellow wires coming from the coils out of the 2-to-1 female connector, and use a spare piece of wire to jump them (the two yellow wires, one from each coil) straight to the battery positive terminal.
Cons:
- It's like leaving the key on, so you'll drain your battery if you leave the wire connected!
- You'll have to manually disconnect this wire in order to shut the bike off. Watch for sparks!
Pro:
- It's a quick, cheap, and easy way to see whether it's worth the time and money to do the relay setup properly.
I actually tried this late last week, and it did make a fair difference in acceleration on my stock 650, as well as giving a smoother idle. I plan on doing the coil power modification, but I can't bring myself to cut into the stock wiring, so I'm going to wait and get some good terminal connectors and make a plug-in harness so that I can remove the relay if needed in the future.
Again, it's the two yellow wires, one from each coil, and use a piece of wire to jumper them straight to the POSITIVE battery terminal. Be sure to wrap it all in electrical tape to avoid shorts.
But don't run your bike like this for more than just a test run, because it's effectively bypassing your kill switch and even the key. You can hit the kill switch, take out the key, and the bike will continue running until you remove the wire from the battery. It's okay for a test, but not a permanent solution!