Can the AC500 use the AC300 Home Integration Kit?

Hello, I have 2 of the AC300 and a AC300 Home Integration Kit for my home. I recently upgraded to The AC500 and would like to know if I can still use the AC300 Home Integration Kit with my AC500’s 30A port as I will not be using the 50A port. I believe this should be okay and work but I wanted to double check before I plugged it in.