The center mount on the Ice Queen utilizes integrated zip tie tunnels. See this video that describes what they are and how to secure the mounts.
Ice Queen Mount STL
3D Printed mounting system for the Boscoyo Studios Ice Queen. The mounts provide a frame structure behind the coro to increase strength and allow mounting to various surfaces. The Ice Queen mount is only available for 1/2″ EMT conduit due to the Ice Queen needing more rigidity from all the cutouts. The mounts feature a hole on the top where a screw can be inserted through the mount and into the EMT to secure it in place. The center junction is made using a 1/2″ PVC cross which allows the smaller EMT conduit to pass through utilizing the included EMT to PVC bushings file. Note these mounts will not fully fit the early first generation of the Ice Queen which had less supporting material around the top & bottom outside mounts with the rounded points. While the pixel holes will align the same, where our mount flares outward there is no corresponding coro on the early versions. Later versions added more coro to support the thin arms. These mounts are designed to be used with the Ice Queen that has the center reinforcing backer plates.