How to turn off the blue barrier below the Nali church in Bluff Eversmoking

I found a way to turn off the blue barrier below the Nali church in Bluff Eversmoking by walking on an edge (see screenshot below). I wonder if there is not another more casual way which doesn't expect the player to climb along a small path on the wall.

It is often possible to shorten the way from A to B in Unreal by rocket jumping and sometimes by walking on edges. Most edge walks reward the player with items but this time it doesn't feel right to me. I don't want to cut corners on this playthrough.