I use plugins that allow me to send code to a ST window running R inside a terminal.
Sounds like you are executing a build script via ST's build system to run your R code?
If yes, you can't currently move it as the build system output is always printed to a panel.
Panels are special views, displayed at the bottom of the window without interfering with the rest of your grid layout. They can't be displayed at the right corner (as column) or moved to any other group.
The only chance to display the output of your build script in a column, was to use
Terminus plugin to run your build script. It can output its content to a panel or an ordinary view. You could even setup a layout, which is applied if Terminus opens so it is always displayed in the second column for instance.
You'd need to study the readme of the Terminus package to learn how to do so.