Good News, he was the cheapest I found, and not many stocked the boot lock.
Bolts?? My car has gone to heaven , and isn't with me to check... I dont remember any bolts.. I think your looking at the actual boot release mechanism. You dont need to touch that.
1. Pop the boot
2. stick your head under and directly behind the key lock you will see dark grey/black steel clip. This is all that holds the whole key lock in place.
3. Once you've found it, you need to jiggle it out. Once out, the lock should just come off the boot panel.
4. Then it gets a bit fiddley from here on, The lock has a clip at the end that holds the barrel in, get it off.
5. Where you normally insert your key, should be a black plastic thing around the key hole, get this off using a thin screwdriver. If you look on the reverse side of that black plastic I think you'll see 4 clip in bits, you need to pop these out, or try doing it from the key hole sie.
6. Once you've done this, the barrel is ready to come out, but you have to press the steel things in the berrel down as these will stop the key barrel from coming out of the lock. but.... the swing thing that had the nissan emblem on it also gets in the way of the barrel, I just used a little elbow muscle & it was fine.
.... Then do the opposit to install the key barrell in the new lock. Just make sure that you lock that steel grey/black clip in tight & correctly.
Hope that helps, but if you need help installing it, just let me know.