A lot of little wiring tasks, but making my way to final organization.
Most of the work was aligned with creating harness "bundles" to tie togther, forming support for each other, etc.
Fabricated a length of L angle on the left side to form a channel for leads to travel to the buss bar and grounding tabs. Cut several wires I had previously terminated in order to shorten the overall cable length, yet still allow some slack to allow EFIS, EIS, and comm stack removal an disconnection. Ran several wires thru the firwall - CHT / EGT, plus oil pressure, temperature.
Terminated the ground wires in spade receptacles and installed in grounding block. Connected the magnetometer leads to the EFIS harness and affixed the DB25 shell covering. Un-tangled a lot of wires!