Scalextric C4520 Volkswagen Golf MK 1 GTI - Carrera Slots

vw slotThis is the Scalextric Volkswagen Beetle Yellow Weathered 132 Analog Slot Car. The car features working headlhts, rear lhts, and comes Dital Plug Ready. While now a treasuredThere's really only one thing on that dash that actually baffles me: some little slots, set in plastic. What are they? Are they a vent? A sensor