I want to press the captain's log button-and go to the sub interior
 

In TMO/OTC when you click the little wheel icon in the lower right hand corner, the captain's log comes up.

I want to change it so that when I click it, it takes me to the captain's cabin/radio room. From there I can access the log form the clipboard on the desk. Just a little silly immersion thing for me.

It sounds pretty easy, just change the link from the captain's log to the interior camera, but I'm not sure exactly what ini or cfg to change.

Where and what would I have to change to do that?

Might be in the Commands.cfg file

May I suggest you print off the "KEYBOARD LAYOUT.jpg" and the "Reference Card.jpg" found in the Optical Targeting Correction mod folders. They will also appear in the "Silent Hunter Wolves of the Pacific" main game folder if you have OTC "Activated" thru JSGME. These will help in finding what OTC commands are linked to, with what keyboard keys.

When using OTC (as long as you don't have a mod overwriting it), the (\) key will take you to the U.S. Radio Room and Captain's Quarters. Why reinvent the wheel??