My Hymer has a roof vent with 4 lights in it, they are Dometic round G4 halogen. I'm swapping the bulbs for 1.5w LEDS but when I removed the standard halogen bulb from the fitting I cannot get the LED bulb back into the small holes in the connector block The wires/prongs will not go back into the very small plastic holder and neither will the original bulb. It's as if the holes no longer line up inside the connector block. So now we have no lights in the roof vent. Any ideas ?