The solvents in the PS fluid does corrode contacts and there is some movement of the wires because the engine fan is right there blowing on it. There is 2 ways of fixing the issue,
1. Install new cables.
2. Cut off the lugs, strip back about 3/4 inch of the wire coat and you can get new wire lugs the same size at Home Depot or what not and crimp them on then solder the connection and seal and re-bolt.
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