Rob, I see you also have an access door in the fwd baggage area to reach the rear of the instrument panel.
Here is what I did:
I mounted several cable blocks including a ground block on the rear side of the access door. Now when I open that door there is very easy access to the wiring as the cable blocks are laying right in front of you. I also put stickers beside them showing which circuit is each wire connection. Two wires (for redundancy) are going from the ground block to the firewall.
PM me if you like to see pictures. Sorry canīt post pics because of the Photobucket issue.
RV-7 flying, IO-375 w. P-Mags, 200RV Prop
RV-8 flying, IO-375, P-Mags, 74RV Prop