Resistance is reading 0 when I connect ESC to Pixhawk Cube

As soon as I plug and ESC into my Cube resistance goes to 0. Have tried plugging ESC in one at a time and the same thing happens…

Does anyone have a troubleshooting idea for this issue? Can see full photos of build components here:

Thanks for taking a look.

Where are you measuring?

Power at XT60, connected like so to multimeter

Video demonstration here, one of the ESC’s is connected upside down in the video but the same result when any one of the ESC’s is connected correctly: