Noob question; Installing intellitronix digital gauge, (tw: LOTS OF DUMB QUESTIONS)

Ok so I need to find the tan wire from the HL switch and before the fuse box, and splice the dash dimmer wire to it?
NO you will eliminate the fuse. You should leave it connected up there to the cluster connector. Don't overthink.........your new cluster wants power for cluster lamps......the old cluster had lamps.......where did it get the power? From the orange wire........that is the output of the dash dimmer (tan) which then went to the inst fuse and then out on the orange wires.