Hey!! sorry for the late response, been a little busy and hope this will still be of use to you. There are little black clips. the bumper has to come off and lay it face down on grass or a blanket, there might be 4 phillips screws, i cant remember, but its quite easy. just slide a flat head to seperate the clips. i will try to look for a youtube to better describe it.
i did run into the issue of it not being steady enough. it moved quite a lot there because it was just bolted into the plastic. since then, i have gotten a 30in diode dynamics bar and mounted it to the radiator fram behind my custom grill.