At the risk of making this seem more complicated than it really is, here is a little more detail specific to my own install.
I drilled a hole off to the side of the probe hole to run the wires through, and used the existing hole as the mount point. The plastic around the probe hole was also cut down be flush with the support webbing to give the mounting screw more clearance. That way it wouldn't interfere with the battery and board.
A tip for soldering the tiny wires from the trail tech; separate the copper from the fiber and cut the fiber off. If you leave the fibers in place they melt and fuck up the solder wetting in.
I wrapped both wires with a tiny bit of electrical tape and then slipped over the heat shrink tube.