It involves a bit of fiddling to get it back in.
Make sure the visor is in the down position so you can rock and twist and push(gently) the send of the visor rod with the spring and clip into the cavity of the windshield frame.
Observe the rounded contour of the bracket against the curvature of the padded surround, they should line up and fit snug.
Then the screws hold it in, 2 phillips, short fat screws with the washers.
Take a photo of what you have and we can help from there.
Walter
1967 220SL-diesel