Halo campaigns have always been full of Easter eggs and collectibles, which is true for Halo Infinite. One such Easter egg that can be tricky to find and activate is the one in the training room in the House of Reckoning mission in Halo Infinite. Youtuber xGarbett has luckily figured out what these switches do.
There are three red switches the player can find and activate in the training room here. Doing so reveals an Easter egg which causes a rocket hog to spawn. This is largely useless because the rocket hog is fairly terrible, and there are no marines to assist you. Still, triggering it is pretty cool!
Related: All Collectibles, Skulls, and Audio Logs Locations in Outpost Tremonius in Halo Infinite campaign
The location for the first switch is behind the control panel where Escharum's hologram speaks before entering the arena. Players can find the second atop the white tower in the center of the training room. From the tower, look across the way to the right side of the wall. Here you will spot the final switches. You will need to use the grapple for the second two switches.
As said, the rocket hog is fairly pointless in this area but can be good to lay down some explosive fire. Check out xGarbett's video below if you have issues finding all three switches. You can also use your AI scan!
For more information on Halo, check out All Collectibles, Skulls, and Audio Logs Locations in The Foundation in Halo Infinite campaign and How to unlock the Bring Shiela Home Safely Secret Achievement in Halo Infinite Campaign? on Pro Game Guides.