This is a variation of Zack's printer mounted gridfinity baseplates, specifically designed to attach to a 20mm V-slot extrusion profile.
I designed this for my Prusa MK2.5S with Bear Frame.
To install, I used a M5x8 and a drop-in t-nut.
To use with 1x3 gridfinity modules, simply install two baseplates at the proper distance.
Remix the included fusion360 archive to suit your needs.
The author hasn't provided the model origin yet.