My neighbor, Poleclimber, just installed a block heater in his TC35A, which is the same arrangement as yours, and I believe the exact same engine block. It went into the same spot as Dieselmonk's picture. He received the block heater, along with directions. I'll email him, and be sure that he reads this. Maybe he'll take, and post a picture for you. He also said that removing the old freeze plug was the major part of the jobbie. I don't think he said anything about removing the starter.