This can be printed by object on one plate in two colors, with no supports needed.

A Bambu Lab scraper slot is located in the back behind the plates.

It connects to the bottom of the X1 or P1 on both sides of the 'handle' recess to prevent movement. You'll need to tilt your printer slightly for installation. Press fit assembly, no screws needed.

Based on @3DPF's design: https://makerworld.com/en/models/121592#profileId-130845