"A" Bar

Hi all,could some one tell me how to fit an "A" bar on the front of my T2.If i was to match the four holes at the bottom,it seems i'll have to cut the bumper to attach the two other clamps half way up the bar.
Do i have to take the bumper off to attach these to the metal behind the bumper,put the bumper back on and cut a slit in the bumper so they join up.??if anybody wants pictures please email me!! :roll: :roll: :?: