Hi guys! Im changing my brake booster and have encountered a slight problem. My question: How do i get the adapters of the 2 wiper spindles off and release the central piece so i can get that plastic lower tray off? Do they unscrew or pry off? I have my booster loose and that lower plastic tray is the only thing stopping me. Reckon i could lose that lower tray all together? Doesnt seem to do much except trap water and crud. Thanks for any input!