The adapter plate with quick-lock system gives the SysBag WP L side pannier a secure hold on the side and luggage racks. To do this, you need to fit the corresponding bracket adaptation kit. If you already have an EVO or PRO side support and would like to purchase SysBag panniers, this kit replaces the existing retaining lugs on the support. A perfect kit for every situation: this adapter kit includes 4 retaining cams and mounting hardware for a PRO side support, EVO pannier support or luggage rack. The installation instructions give a detailed explanation of the type of components required for the corresponding support.