I’m looking to use this (https://www.amazon.com/Ibera-Bicycle-Triangle-Frame-Bag/dp/B00H1KUCQY) Ibera bag to hold my battery and controller. I don’t think it has holes for the wires so I think I will use grommets. I found fabric grommets online that have a hole and punch through the fabric. I want to make it insulated against water, so I found cable glands which are meant to mount in holes in a solid material. I also thought about using rubber between the grommet and then punching a small hole for the wire to go through. I was wondering if there is a better solution.