Ci red/clear TAIL-LIGHT install..??

[Stevo]

Hello all,
I came across this forum hoping to get a little help with the installation of my red/clear taillight assembly. You guys seem to know what's up when it comes to these cars. So, I have a '00 328Ci..clears, 19" Lowenharts, stereo...yadayada... I just bought these red /clear taillights about a week ago. I planned on putting them in myself, because I enjoy working on my car. When I looked at the rear taillight assembly, I noticed that there is a metal plate that sits on top of the taillights(when viewing from inside trunk). This wouldn't be a problem, but I can only see one bolt that can be removed, and it doesn't seem logical that this one bolt would hold up the metal piece that runs past the taillight to the right side of the trunk. Do any of you guys have any prior experience/knowledge with this? Any help would be appreciated..thanks in advance