Looking for wiring help on which way to wire through the AMP gauge:

#1 - Wiring from the battery to starter, wire from starter to AMP gauge, through AMP gauge to ignition switch, through switch to ballast then to + on coil. Which side +/- should the wire from the starter connect to the AMP gauge? Or does it matter?

#2 - My wiring harness has a red wire from the alternator to AMP gauge. Does it matter which side +/-?

Is there a "Rule of Thumb" when wiring through the AMP gauge?

These are the two things I'd like to accomplish tomorrow. Thanks for any help.
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1946 1/2Ton w/4-speed manual transmission w/1960 235 engine
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