They are snap-on caps. They have a very slight edge on the inside of the hole that the screw head goes into. If you crack the cap, or otherwise disturb that edge, they will fall off. Most of the time, those caps are pretty durable.
ah thank you >.> only found out today one of the covers near the door lock was poping off (put the door back in a hurry because of rain and didn't finetune it >.>) and yea noticed that 2 of th 4 screws for the door have a little rim for the cover to catch on. by sheer luck i put the one's with a edge at the bottom and the edgeless ones at the front so yeaThey are snap-on caps. They have a very slight edge on the inside of the hole that the screw head goes into. If you crack the cap, or otherwise disturb that edge, they will fall off. Most of the time, those caps are pretty durable.