from memory, many years ago I made the mistake of not putting the hinge bolts back where I got them from. The issue being that one bolt is longer than the other, and if you put the long bolt in the short hole you will puncture the surface of the boot skin. I learnt the hard way on that one. Also unless they are in remarkably good condition, it’s probably a good time to replace the rubber sleeve that goes into the boot lid at the point where the hinge brackets slot in.