The cover is a tight fit.But it fits!! Just push down on it as you slide it back. The two prongs that hold the cover in place will ease into place. Just go easy and use firm but reasonable pressure.

Also - you will need to modify the cover plate to clear the antenna. Just dremel out a small semi-circle section or lengthen the cut-out. See where the grey module ends and the cover starts on the picture! Easy!

Hope that helps.