I have everything (hopefully) wired up correctly per the directions, but I need to attach a wire to the ignition wire. So if I am gonna try and attach it to the part of the wiring harness going to the fuse box, which color wire in that gigantic mess is the ignition wire?

While I am in there, if anyone knows what colors are for these wires or can tell me how to wire them exactly, that would be great

WHITE WIRE: +12V or (-) NEGATIVE PARKING LIGHT (Jumper Selectable On- Board Relay 10A)
Connect to switched +12V parking light wire at back of light switch. If this is not possible, connect directly
to one of the parking lights at the front of the vehicle. If your vehicle requires a (-) Negative Ground signal
to activate the parking lights, then you have to open the control and move the jumper located on the
circuit board inside the unit. For European vehicles with separate right and left circuits, use a dual relay or
2 diodes to separate the output signal. The DEFAULT output is POSITIVE.

BLACK/ WHITE WIRE: (-) NEG. or +12V DOME LIGHT (Jumper Selectable On- Board Relay- 10A)
Connect to dome light activation circuit for Negative type circuits. For Positive type circuits, open the
control module and move the jumper the plug as shown in illustration.
The DEFAULT is NEGATIVE.

Positive parking lights, it's a brown wire in the driver's kick panel. Test it with a meter.
Don't use the dome light, use a door trigger wire instead.