My car has an L shaped bracket in my trunk that im not sure what it does.
its to the right of center and torwards the front of the trunk.
I think it might be a jack holder but im not sure. I havent seen it in some pics that ive looked at of other peoples cars.

That is part of the jack securing system. the end of the jack fits into that L-bracket and lays underneath the spare tire. The base of the jack is used a plate that the wing-nut for holding the spare tire down bears against.

ok thanks