the Y electrical harness. Basically you remove the pink/yellow wire @ #13 on the yellow adapter and 2-pin connecter #1 takes its place, then the pink/yellow goes into #2 (should be same cavity as yellow/red wire). The 2-pin connecter on star wire harness from the grille, goes into #3. The 2-pin connectors should clic NOTE: Before inserting the pink/yellow 2-pin connector into the Y harness please make sure your wires are routed correctly under those wires that sit on top of the SAM box. :) LOL.