Player 1: Step on the Arial Faith Plate nearby and you’ll be launched into the funnel, which will carry you right into sectioned off part of the chamber. Once you’re safely over the upper ledge (by the button), drop down.
Player 2 : Once player 1 is ready and waiting near the button, replace the portal that’s on the far wall so it’s now located on the vertical, rectangular wall panel that’s facing player 1. Make sure that’s directed so the funnel is passing directly underneath the chute that’ll drop the round weight needed to complete the chamber.
Player 2: Stand on the red button as this’ll drop down the panels, allowing player 1 to perform their next step.