Although it's the same panel, I didn't need to touch that part. I could easily pull down just the other side.
I managed to route the cables easily, up through the rear view mirror surround:
View attachment 14170
The right hand side of the panel pops off easily with a plastic pry tool
Then push cable up under trim at top of windscreen.
The A pillar is really easy, pull away the rubber trim and you'll easily get in behind the plastic a pillar panel
View attachment 14171
Good luck
EDIT - The Micro Piggyback Connectors, 2 pin ones for the permanent live see
HERE were impossibly tight, I had to trim away some plastic on the fuse to get it to go in. The three pin one for the switched connection was fine ?