Is your boat a mid-to-late 80's Ericson?
If so, the same crew probably fitted it out that did our boat.
There may be thin teak battens running down each side of the cabin wall interior, top and bottom. A number of #6 or #7 bronze screws flush-set along surface. Under the side deck, and covering the area of stanchion base areas that vinyl material is stapled to a one inch strip of plywood glassed to the top of the hull.
What they did was staple, with hundreds (!) of power-driven staples, the liner. Next they would run a knife along just beyond that line of staples and remove the excess vinyl. And last, cover the stapled surface with the teak trim strip where you would see it by the teak veneered cabin side. Under the side deck, I have no idea how they covered that staple line on your model, as my model has a different type of hull ceiling material.
You should find a long zipper running along the material under the side deck, and this is zipped back to allow access to stanchion base backing plates and nuts on their bolts. That aluminum alloy zipper pull may or may not work after all these years... a new pull is about fifty cents, and is difficult to put back on.
Last resort for any hardware repair concealed by the liner.... is to pull a hundred staples... and re-drive new staples when you are done.
If you have pictures of the afflicted area, please post them up. This will help others help you.
Regards,
Loren