I just acquired a gen 2 alpha setup to put on my boat . One of the studs was broke but I managed to get it out . My current transom has 6 holes instead of 8 . Do I need the top two or can just use six like my current setup . I’ll get he template and drill holes if not but I figured six was holding it before why does it need 8? Also there are no anode studs on the newer housing , do I need those?