I'm in the process of doing the same thing to my Sensation. I wanted to make sure that the Touchstone charger would support the weight of my phone in it's case, so I took the short cut of using parts from a microUSB charger to route from the induction coil terminals to the charge port. I'm halfway through routing all the necessary connections to go through the board instead of the charge port. In the attached picture, I've highlighted 2 test points that will let you route your +5v line into the board. I'll use the metal housing of the sim card reader to attach the ground.
Since the back of the phone is metal and its always going to be in a case I'm going to have to use pogo plugs or some other form of metal contacts to go through the back housing to allow me to pull off the case/back whenever I need. I'll have my charge port free to use over USB as well