Painél - Acesso externo

I have a panel that I want to give access to one of my clients to follow the statistics of his projects.

So far so good! It happens that when I give permission, he can access it, but if he clicks on the graphics he can access the item that opens in a list on the screen division and has information that is internal and confidential (I highlighted the part that I don’t want him to see).

I would like him to have access only to the panel / dashboard, without checking the content and columns when he clicks.

How do I restrict this restriction?

Can anyone help me?