I also went with the Garmin Mini2 but am using Garmin's own Constant Power Cable. The only thing I had to remove for install was the driver side grab handle.I got this bundle for a Garmin dash mini 2 with dongar adapter. took 3 mins to install (attaches to auto dim rear mirror). and its small enough that you don't see it at all when driving and it's not obvious (so don't think it's getting stolen with roof off).
https://dongar.tech/products/mini2kit
Used a trim tool kit to help hide the cable in the top windshield frame and a-pillar.
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