Yellow and black are both negative so the first picture you connected the positive terminal to negative. Hard to say what damage you did. First check all fuses including the one on the starter soleniod and engine breaker. Looks like you have the wiring correct in the second picture so one bad fuses are replaced you’ll need to test all systems to see what is not working and go from there.
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1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2
Mike
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