Can’t connect VESC tool to my ESC. Pls help

Hi, The throttle and power draw settings on my Flipsky 75350 are way off out of the box so I purchased the VESC Tool in hopes of being able to calibrate. I've tried both the windows version and the iOS with 2 separate cables and can't figure out how to connect VESC Tool/ESC. I am going to scan>scanBLE and nothing shows up. Very grateful for any help!!