Ok ..... I did similar and used plastic pipe that a fellow camera trapper, Tim Torell, told me he does. The pipe allows the wires to run up through the plastic pipe. Very similar idea to the doweling. He mentioned to me to get the plastic pipe from Home Depot which you can actually get two sizes if you want. AA size and AAA size if necessary for your project or projects. Just cut the plastic pipe the length of the AA or AAA batteries you are using. I also just used normal screws and soldered the wires to them as shown. I also used 5.5*2.1mm DC pigtails for ease connecting and disconnecting. I plan on using these throughout the builds and flashes. I wanna do up a few builds if possible. You can reference the pictures ..........

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