Reset Button on Synology 220+

Hi, I've been reading your instruction on dismantling the Synology 220+, my question is. I 've clumsily  pressed the reset button too hard and the is no resistance now so I feel I 've need to follow the dismantling instructions, can you tell me at what point on your instructions will I have access to the compartment where the reset button is housed to assess the damage, to repair.