Hi Wally1
mine had a meshed hole in that exact place not sure how much it helped to cool the engine if at all to be honest . Keeping the engine from overheating has been discussed many times on the forum I managed to solve my own problems in that area on my buggy without resorting to some of the more outlandish and extreme and fair play creative suggestions that I read here and were suggested at various times . Suggest you check out the cooling issues section there is lots of good help and actual solutions there it might be helpful .
My own expereince says cutting a hole where you suggest is a waste of time and will not help at all ..
Radar