I had previously picked up a KLIM Nac Pak backpack to ride with and when I got a radio set, I found a great place to carry the radio. The Nac Pak has a semi rigid goggle case on the top and inside is a cloth pouch. This was a perfect spot for the radio, but needs a spot for the antennae to exit. I purchased al brass tarp grommet kit and used the punch to make a hole in the goggle case and pounded in a grommet. The wires go through the hydration pouch via a small slit I made inside and then down the left shoulder strap. The hydration tube exits the right side. Worked like a charm the few times I have used it.  Just thought I would share...