Tunnel Access Kit install STEP 1 align-access-cover-mark-cutting-area STEP 2 trace-the-corners-to-90-angle STEP 3 drill-holes-in-the-the-corners remove-material-from-all-4-corners STEP 5 cut cut-out-rectangle STEP 5 remove metal to access hole STEP 7 check-access-plate-for-fitment STEP 8 weld-access-cover-plate STEP 8 finish with paint or coating