from where could I access ? the doors are locked

Salaam brother. The front "black" door is usually open from zohr prayer till isha. Push the door just a little hard. There's also another entrance in the back. Slide the gate and come in. Most of the time the chain lock inside is open. Hope the information is helpful. Thanks.

Aslm brother, Yes it is locked after Fajr to before zuhar(1pm) on weekdays.

Side gate is always open