1973 Imperial Underdash Wiring

So after months of waiting on my Waldron exhaust and installing a new ThermoQuad on the 440, I’m cleaning up under the dash to try to find the parasitic draw that kills my battery after 3 days. I cleaned up the hacked up ignition wiring and found an NOS Chrysler to Saginaw jumper harness.

Now my question is what is the fuse holder with the pink and light green wire for? I have not had luck in finding a straightforward answer in the FSM.

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