when you look at the front of the cam, it should have a upside down L shape on the lens housing, from the back, the big long plug towards the outside of the frame and the connector closest to the bottom plate.
You have to carefuly remove the screws on the lens part (careful not to loose the spacers on the back that secures the heat sink) and place that plate that came with your kit to the front of the cam and secure the lens back down. that should have the little notch top and bottom,,,,,, that fits into the corresponding holes in the frame. I use a dab of goop to keep it in place.
Is that piece that i mention in the paragraph above shorter than the cameras board?
Are you in the states?