Mounted the TG-10 Triangular box on the firewall. I punched a two inch hole in the firewall just above the plenem baffle. I used a small amount of 3M Heat resistant sealant to prevent leakage. I installed three MS21191WD6 adell clamps for my CT A-740 push/pull cable after determining the route on the inside of the firewall. The cable will be installed as the panel is completed..