What you have there is the result of using a
fender washer as a substitute for the missing
pad. As the ball was forced into the hole of
the washer it pushed some of the material back.
If I could make a suggestion you could drill a
hole into a piece of steel a little deeper than
where you want to add some material. The
alumi-braze really shrinks when it cools. Devise
some way to balance the screw in the hole and
fill the hole with the alumi-braze. It should pull
out the steel. Your screw looks to be aluminum?
If it is brass I don’t know if the a“alumi-braze”
would stick to it.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.