Temporal Solution | Bonus stage The Talos Principle Guide

Connect the buttons with the sources

Take two connectors and set them on both sides, while directing them towards the sources and the corresponding buttons. Do not worry about the fact that the beams are interfering with each other.

To fix this, use the third connector. Approach the gate and aim on to the blue source - the beam traveling from the connector to the source blocks off the beam and allows the other beam reach its destination. Do the same and direct the connector to the red source.