This is a simple Magsafe phone mount for the MKV Supra. There are two models available:

1. Flat
2. Angled

The mount clips into the grooves on the dash as shown in the installation video below.

You will need to buy a ring magnet to attach to the mount. If you don't have a Magsafe phone/case already, you'll need a ring magnet for your phone also. The ones I linked are cheap and arrived relatively fast for me. I did add a bit of superglue to the mount before placing the adhesive side of the ring magnet in place just in case it wasn't strong enough to hold the magnet in place.

I did notice when mounting it in different spots that the dash is not perfectly consistent and some spots are a little tighter than others. I made it so that it can still fit in the tight spots with a little extra squeezing but still be secure in the looser spots. Not sure if different cars will be much different but I'm assuming it should be pretty close.