simple EEKeeper question: variables to make a dualed mage a Trasnmuter?

Been away from this game for about five or six years, so I kind of forgot some basic stuff...

In a BGEE game I just completed I made dual classed Transmuter 5/Fighter 8. I enjoy playing specialist mages that always memorize at least half of their spells from their chosen school. That twist adds a bit of a challenge that I like. It was fun, because he relied a lot on spells that are dangerous to live by such as Color Spay and Shocking Grasp. This was fine for BGEE.

But to take him on into BG2EE I'd rather switch the classes around so that he can get unlimited spell progression. So for the BG2EE game, by leveling up the same abilities build in BGEE, I started with Fighter and at level 6 dualed to Mage. However, I forgot that when you dual class you can't pick a mage specialization.

I still want him to be a Transmuter versus a vanilla mage. Are there variables I can slap on him via EEKeeper to make him a Transmuter?