First time water cooling need help with GPU water block installation

hello this is my first time water cooling and Im using a GTX 970 galax and putting a water block on it I took the cooler off now I need to take the VRM heatsink off.I have pics. but i don't know how to take these little black screws or something off. I would really appreciate it if someone could tell me how to get them off so I can put my water block on it.

Yours sincerely Benjibub.

Small tip screwdrivers + gentle but strong persuasion.

I just uploaded an image off what I need to take off.

anyway man thanks for the reply but I just figured how to do it. you need to push the pin out then when its out push the side in and pull

pinch the back of it and push up and through