A set of blanking caps for the wiring harness as an option (set consisting of 1 blanking receptacle, 4-pin; 2 jack housings, 2-pin, and 4 rubber grommets). These items can be used to seal off the free ends of the wires for the turn indicators and the license-plate carrier to keep the ends clean.

BMW S1000RR HP Race Wiring Harness Blanking Caps
BMW Original Parts