As others have said, the release button is on the bottom.
Fortunately for you, you broke the one that is physically part of the battery AND you plan on replacing or bypassing that battery, so it will be swapped out anyway. You can simply leave the orange cable unplugged if you wish. Had you broken the back one, you'd have to replace a chunk of wiring harness.
Unplug the grey-wired connector on the other side of the BCM that is closest to the driver's side and you'll be good to go as a gas car.
The "bigger hammer" rule doesn't apply to the Insight. If it doesn't move, you missed something - don't force it.
Originally Posted by MitchJi
Things went relatively smoothly until:
I couldn't get the connectors to come off. I tried to pry them off with a screwdriver and broke a connector!:
I'd really appreciate instructions for pulling the connectors and suggestions for dealing with the broken connector. I'm hoping the plug holds together and when I put it back on maybe I can glue on the broken piece for protection.