NGUI KeyBinding Reversal?

I'm using NGUI and FORCEX 3D radar package for a game i'm creating, in the radar package, you can select targets using the "T" button or the "R" button on the keyboard. I added KeyBinding to an NGUI button to be able to select targets on a mobile device, however, although pressing either T or R activates the button and selects a target, it doesn't work the other way around when pressing the button.

So what i'm asking is, is there a way of binding an NGUI button when pressed to a keyboard letter to be able to access keyboard inputs in other packages when a keyboard isn't available on a mobile device.