If you’re still trying to get into the boot, one of the only ways is through the drivers side licence plate light located on the under of Boot (naturally above the license plate). I’ve done it so I know it can be done

it’s hard to miss the latch but the mech to lock unlock is right there. I’ve attached a few images, I was able to open mine with a long, narrow slotted screwdriver. We you’re messing around in that area, it would be a great idea to apply masking tape all around the area you are working on. The time when it’s hot, and patience runs thin, is the time when you ship with the screwdriver and scratch the paint (that’s not my experience talking but I’ve seen it happen.

Another great approach is to look at a few of the lock mechanisms for sale on eBay. The images may give you some valuable insight.

Good luck, it can be down just take your time n