IIRC, the Trooper uses the same brackets as the VX so that won't show you where the notch is needed since your brackets are modified. Best bet is to get a measurement off of your pumpkin & make a notch before you paint it. It looks like all that's needed is a half moon notch in the roll over portion of the bracket about 2" above the bottom mounting bolt on that side. I'd suggest oversizing that notch in case you ever need to remove that bolt (I didn't & will probably eventually regret it).

You can tell by the pic that I learnt it the hard way & just don't want you to have to use the grinder whilst tucked up under the VX like I did ... not fun ... & painful (glowing metal shards tend to be rather hot).