My mount is pretty specific but basically I got one of these ball mounts: https://www.amazon.com/gp/product/B08FPNH4FG/
I have a Jeep Grand Cherokee and on the panel below the head unit there were some dummy/unused buttons near the bottom. I removed the metal plate from that ball mount and mounted it through the back of plastic dummy button by drilling three small holes through it. I'll post a pic later to show it, have to go take one in the car.
Item 1: https://www.proclipusa.com
Item 2: www dot amazon dot com/dp/B08FPNH4FG?ref=ppx_yo2ov_dt_b_product_details&th=1
Item 3: www dot amazon dot com/gp/product/B07D1L2TDQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Item 4: www dot amazon dot com/gp/product/B07RBX1J8H/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
Item 2: www dot amazon dot com/dp/B08FPNH4FG?ref=ppx_yo2ov_dt_b_product_details&th=1
You would need something like this (the blue printed part) to use it with the phone mount above, I just printed this part cause I can.