https://www.ebay.com/itm/2817510716...9eclnfptw_WpqlTi5Oj2cTq_t6xoC5NAQAvD_BwELooks like the head off the lower bolts on an Alpha 1 gen 1 shouldn’t need a wrench from the inside. You should be able to just tighten the anode nut.
Have you done the slight hammer tap I recommended earlier to verify if the transom is solid? Otherwise tightening won’t do anything but make things worse.
Don’t blame Sea Ray for something Mercruiser.