These are brackets that you can attach to the wall on which you can place the Bambu Lab AMS.
The brackets are too large to print on a Bambu Lab printer, I printed them on a Mingda Magician Pro, one as the model and one as a mirrored model.
The dimensions of the bracket are 346x200x40 mm.
Printed with a 0.6 mm. nozzle, layer height 0.3 mm, material PLA+
 

Available for download as stl, step and f3d (Fusion 360)