My OEMs
What I call the click lock (lever cam lock) upper left, velcro strap upper right, and the two hooks on the bottom.
This locks in to where the hardtop would connect to. Both of these were broken off when I bought the car.
This is what really holds mine tight, velcro strap that goes around the roll bar. That little strap cost $15.
Hook on back end which looks like what you have on yours.
Hook on other side of back end.
i didn't show it, but the two halves interlock together.