Bonnet and Boot

Here you  can see the front bonnet and the back boot open. I made them open and close by constraining controls to them. I moved the pivot point on the bonnet in the front middle of it so it opens like that . and moved the pivot point on the back boot to the right left vert. i dont think it matter if its the left or right one , it just needs to be on the back of the boot.I have limited the transformation on them as well . so they open and close to a certain point and dont go berzerk spining 360 degrees