Can't see the pictures. However, you have to drill into the fender to mount the side markers, and wire them to the turn signal/parking light. As for the rpm problem, was it just the tach jumping around, or was the motor jumping around as well?
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget