Felt in the dishwasher ⇐ Bosch

[necromancer7]

Hello everybody! The other day I purchased a dishwasher Bosch SMV25BX02R is a display sample, and it seemed strange to me that there is insulation on the top and right (sort of like green felt), but there is none on the left. As if he should be there. Please tell me if it should be there, and why is it even needed? What are the consequences if he is not there on the left? I called the store, they don’t know, they offered to make a return if necessary, but transporting the dishwasher is a hassle