Cut it Out | Bonus stage The Talos Principle Guide

After you enter the area, you notice two connectors. Place one of them on the button-source connection and take the other one across the open gate. Now, direct the beam to the source. It needs to intersect the beam from the first connector - it is important to set the first one of the connectors, to do this properly (thanks to which the beam forms a wide angle).

The lever to block the fan

Walk over to the neighboring room. There is a lever there - use it.

Block the beam traveling from the source to the button

Walk over from the connector to the last room. Aim one end at the first source and the second one so as the beam from the source in front of you to be directed towards the previous source - i.e. intersect with the beam traveling towards the button.