Mounting a 30in lightbar behind trd pro grill

weird question I know! I currently have a 40in lightbar behind my trd pro grill. It is leaking after a few years/ hitting a deer and needs to be replaced, going to drop a onx6 high power light bar in its place. I don’t need a 40in bar, since my fab fours pre runner guard covers up both ends of the lightbar currently (and it saves me $300 to get the 30 instead of the 40). The thing that concerns me are the cut outs on the grill support bracket, normally I would go pop my grill off and measure, but my grill cannot be removed without loosening my bumper (we have it mounted super flush so no gaps). Anyone have one laying around or easy access? Thanks!

 

Ever figure it out? Looking to put my 40 behind the pro grill.