Installed the ignition switch relay that I picked up from Viking at Zenith OHD a couple of weeks ago. The relay was a recent addition to prevent damage to the ignition switch. I found that by installing it on the bottom of the wiring bay the wires on the-wired receptacle would reach their destinations without adding additional length. Basically, I needed to reach the S terminal on the ignition, and the power and ground busses.
After that, I re-installed the ECU, which Viking picked up at OHD and sent back a week or so later with software updated.