You need to meet Hector on Saturday morning
in his penthouse.
(The location will be unlocked and you will be allowed in).
Take it seriously, be sober, don't be late, and try to
raise all your parameters as much as possible.
Also an important requirement is that you visit
Nestor by this time, otherwise there will be
no progress. Go to the appointed time and talk to Don.
You will have two main paths.
Either restore relations, or remain enemies forever.
In the first case, the passage will be more difficult,
but there will be more content.
In the second case, it will be easier,
but more dangerous for life.
It's up to you to decide.