a bracket coupling a headlamp module to a fixed structure is sandwiched between two ribs that constrain the bracket in only the cross - car direction . internal clearances in the bracket or rib features for accepting attachment bolts are designed to provide fore / aft and up / down position adjustments . the sandwich structure can be locked in for a rigid , final attachment to the vehicle which will nevertheless allow sliding of the bracket within the ribs when subjected to the forces corresponding to an impact .