Once you have sourced them fig 1
Window down then look behind the rubber channel fig 2
You will find three screws top middle and bottom fig 3/4/5
Once you have removed the three screws peel back the rubber fig 6/7
Then remove the panel like so below fitting is reverse fig 8
Job done i think these could be rubbed down and sprayed if not to bad a condition may try it one day and post the out come cheers Zion.
Stainless Steel Handbrake Compensators Installation Guide
MGZT 190 V6 Anthracite Black