Gta5, how to finish the task without disturbing Loko?

Gta5 doesn't disturb Loko's mission passing way:

1, when you get there, turn over directly. Go straight and there is a ladder. Just walk past and you will go up.

Although there are two people beside you, it won't bother you to go up directly. After the first ladder goes up, you will see a person. Hold down the Ctrl key and walk quietly. You can knock him down with one foot or a circle, and then keep walking.

At this time, you will see two ladders. Take the ladder on the right. After going up, two people will come out of the door. Don't worry at this time, just walk past. After two people walk past, go straight, cross the aisle and go straight in.

4. You will see an upward ladder, just climb it. Start the plot after going up, and you can continue to do the following tasks.