Morning

I have an STL 2013 and having a issue with top cases. I know I need the bracket for any top case but I was told I need to purchase both the Sport Rack Kit( SKU#219400101) and the Passenger Back Rest( SKU#219400350). My question is ,wouldn't I just need the kit since the hardware is in that the case attaches to. My other question is to those that have a back rest does it cover the brake lights and if so how did you fix that ( moving it towards the rider so it is exposed or did you not have an issue. I was also thinking of having a bracket fabricated but not sure where to go. Any help would be greatly appreciated. TIA
Chelle