actually their is no need of epoxy because you mounting projector with screws. first mark the cuttoff of your stock headlights on wall and then make small hole in center of reflector then just place the procjector through the hole and then turn it on move it your hand to get proper position according to the marks you made on wall then just use a hot glue on back side of projector to let projector to hold its positon then you can leave the projector after the glue gets hard then make holes through reflectors for screws