Quick write up for you.
Pull straight out on the panel covering this are to expose one screw.
Then remove three screws from this panel
Just let it fall down and hang in place
Remove two screws from the main panel. One on each corner
Now pull the left side of the panel to expose the back of the switches. It will require some effort and just use common sense on the amount of force. If it absolutly won't budge then look for something else holding it. Don't worry about undoing the right side. Its quite a bit more in depth from what I know. There is enough flex in the panel to get to what you need.
On the back of the switches there are three plugs. Leave the green on alone and remove the top right one and get it out of the way.
Then the bottom right white plug is the one you want to deal with. unplug it and cut the wires going to the keyed lock. Strip the ends and twist together. Tape, wire nut, solder, what ever you want to do and plug it back in. Check the trunk switch for functionality. If everything works put it back together. If it doesn't work the problem is elsewhere.