Help locating a few electrical connections

[LREJP]

I’m in the process of tracing damage to the .5mm black wire that runs from the front fuse panel position 4 (5amp) in and out of the front harness ending at the frunk light switch. So far I know the wire leading to that switch is fried, as are the wires through the glovebox light, clock, and down through the ignition switch buzzer contact. All are fried. From that point to the fuse box I’ve lost the trail. The diagram shows two connectors and the “seat belt control unit”
I’m hoping someone can help guide me to the location on the car of these points in the circuit.

1) Sheet 2, L,5 - The first connector after the fuse panel - 1mm black wire coming from the fuse panel position 4 into what may be a 6 pin connector. The diagram only shows a 1mm red (to radio) and a .5mm black coming out of pin #1

2) Sheet 2, L,3 - the second connector in the same circuit - this would be the connector that send power up to the interior overhead lights. The .5mm black wire coming from the previous connector shares a pin on the female side of the connector with another .5mm wire which goes to the ignition switch buzzer contact.

3) Sheet 7, H,53 - The ‘seat belt control unit’ - is this just the center relay behind the gauges? Mine is missing, but the violet wire from the ignition switch buzzer contact is also a bit crispy and should be changed, and the ‘control unit’ is it’s next stop.

If others have had this issue, are there any other areas I should check. So far the damage seems isolated to the .5mm black wire and that one section of violet wire.
Any help is appreciated. Thanks!
Eric