I am new to the Rinker family and am very excited for spring. I have a 2005 312 fiesta fee. I was replacing the lower unit anodes and realized that the trim tabs do not have their individual anodes. There is a large plate anode on the transom in the center and the standard ones on each lower unit. I am assuming that they are stainless and not necessary. There are no holes for them to be installed either. Any insight?