I know what you're going through m8, there's just no damn leeway on those sockets. Just a matter of patiently persevering until you manage to hook the two clips over the prongs and then pull the lever across to tighten the installation. It's a lot easier to install heatsinks first before installing the motherboard into the case, just lay the board on an anti-static bag on a tabletop etc. That way you can get a better angle on things and don't have to worry about other components getting in the way
