I am going to install a MOPAR light bar on my 2013 JKL. The instructions are not very good. First, how do I remove the OEM plastic "apron" under the front bumper. It is attached by 3 what appear to be, plastic rivets. How do the rivets come out? Are they re-useable? The spacer between the bumper and the grill also has plastic fasteners. How do they come out? are they re-useable? I have to loosen the bumper and pull it forward slightly to get the spacer out to cut slots in it for the light bar to pass thru. Not going to touch anything until I hear from you all. Thanks in advance.