You have to remove the plate to get to the bolts for CAB bracket. Just remove the 8 bolts that hold it in place. I'm at work so I don't have torque specs handy for re-assembly. Technically, these 8 bolts are supposed to be replaced and not re-used but a lot of people ignore this.
04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump