aluminum radiator question

[Kaptain Kadian]

I recently purchased an aluminum radiator and I missed some really fine print that it is only a direct replacement for a manual transmission. The seller said: If you have an auto transmission, you would need to modify and re-tap the ports and get the fittings separately. Also, another option is to get an external TOC. I don't under this. My transmission lines fit into the ports fine. Will it not fit because it doesn't have an internal transmission cooling box? What are transmission line ports on it for then? Thanks.