Structural Load Bearing Capacity of H2 Series?

As the title suggests, does anyone know what the maximum load bearing capacity of the H2 series frame is for placing or mounting additional AMS units on top of the printer? I am currently using a mount that holds 2x AMS 2 Pro and 1x AMS HT on top of the printer with the majority of the load transferred and supported by the left and right edges of the printer where the glass is supported by the printer frame and away from the center of the glass. I haven’t noticed anything concerning at all with this setup but I am curious what this number might be.