Ok, 2nd picture I see stuff I recognise and something I should not see inside the car, let alone under the dash.
The partial round terminal is for the steering column. I think the smaller rectangular terminal is for the instrument cluster.
But I swear the rectangular terminal with the little nub on the LH side (the one you are most concerned about) is the forward light harness bulkhead connector. That connects to the fuse panel on the ENGINE side of the firewall and connects the front headlights.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
