Lift up the plastic cover at the base of the wiper. There is a nut under it and it may need to be tightened. You may need to put the hood into it's upright vertical position.

I recently replaced the wipers on my 300SE and I had to completely remove both arms to do the job. A PO had put the wrong size and type on the car.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.