last year i had to replace my oem headlight with an aftermarket cause it got busted obviously, but this year im wanting to go back to the OEM. I keep seeing them with and without mounting pins. I honestly dont even remember these things on mine when i took it off, of course i wasn't really paying attention. and im pretty sure my aftermarket one didnt have them. can anyone give me any idea of what these darn things actually do? and should they be there and why?