How to -II
If you cant get to the stem, to install a backing plate and or nuts, You can buy 3/8"-16, s.s. "toggle" nuts, that you can, install, from above deck, by drilling 3 1/2" dia. holes then with a file it square, the toggle nuts are rectangular, 1/2" x 2 1/2" x 1/2" with a plastic applicator, that draws, the toggle in position, and holds it there until you install the bolts, now if you need to, the bruce anchor roller can be positioned up to 30 degrees, from the boat's centerline.