I received the wiring harness a couple of days ago and if the UPS gods are with me, I should be receiving the dashboard light bar today, hopefully intact since these parts are evidently somewhat scarce at the moment (but surely plentiful in wrecked cars and very easy to remove). From looking at the harness, I will try first simply to install the new harness in place of the OEM 2017 harness, rather than fashioning any sort of sub-harness. I won't know until I get in there but it really does not look like it will be that hard to access. It looks like I will have an extra LED that Ford used to light the glovebox on pre-2017 cars, though I am not sure if that one was somehow switched which might mean the 2017s are missing yet another part. If so, I'll just tape over the LED and leave it tucked under the dash. I'll report back how it goes.