For a troodon V1, Mounts on the mgn9 carriage spot, on the bottom. using a Cartographer3D low profile sensor.

Im have a mosquito hotend so you may need to adjust.

with nozzle touching the bed, it needs to be 3mm way from the bed .

https://cartographer3d.com/products/cartographer-probe-v3-with-input-shaping-low-profile-both-can-usb