Drill thru at the appropriate spots and use the Hapijac buttons and tabs. With a heavy duty bumper like yours shouldn't be an issue. Our 04 Duramax Chevy rear bumper is doing just fine with that set up. Even added 2 more for receiver mounted cargo tray/steps unit stabilization and Derringer turnbuckles we modified even shorter. Works great for us.
2004 Chevy 3500 Duramax all stock
1990 950 Shadow Cruiser Hard side multiple add-ons
Ancient Valco 10'x5' John boat
2011 Toyota FJ Cruiser Trail Team
One-eyed Trail Horse and one horse trailer
Rocky, Annie, Muffie traveling Fur Babies