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

??? you mean direct? You should have picked power off what is there, as it goes through the key. You don't want it powered all the time. 5A is way way overkill, maybe 2A or maybe 1A is all you need.

That's part of the instructions for "Battery - Red"

What I am wondering is should I have used the fuse box?

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