There are two ways to install PBP 34-102-S: Freightliner M2 Headlight Bezel Pair Chrome with Clips - Driver & Passenger Side.
Option #1:
If you have the installation holes on your truck you can use the clips, which are included in bezels shipped to you, you have clip in the bezels to your truck. You will need 10 clips for each bezel.
Option #2:
If you do not have the installation holes on your truck you can glue the bezels to your truck.
Please consult your mechanic for more help if required.