Look at the plate your camera screws to. If it's about 5 inches across with the screws 3.5 inches apart, these fit — that's the standard 4-inch junction box pattern most wired cameras use.
The problem is rarely the box. It's where the box is. Under an eave the camera aims at the ground. On a flat wall it stares down the siding instead of across the yard.
Each of these sets the angle the install needs. One camera or two, soffit or wall, 45° through 90°.