How can I show Connect Boards in my Zoho Email Calendar

How can I show Connect Boards in my Zoho Email Calendar

Hello,
we are using zoho workplace but our employees are very confused because they cannot see deadlines in zoho connect boards in their Zoho Mail calendar.
I am searching a way to show events in that calendar, but without luck.
It seems incredible to me that this very important option is missing.
I see that there is a toy calendar inside Connect where I can see all events but it is almost unusable: it takes 3 minutes to render my agenda (and app is not responding while I wait).

Can you please tell me how to see al my events in one calendar?
Thanks,
Mario