Started to put my heads on. Got one side done. Put the other side on and started to freak because it did'nt look right. It was only covering half a hole. Turned out it was just some kind plug thing.

Did kind screw up and put the wrong bolts ( I think) in on the bottom ( the short ones). They did'nt have a circle on top? I found the right ones later. I just took the wrong ones out and replaced themn with the circle ones retightened everything a couple times. Hope it will be ok.