Version: ROS 2 Humble

disk_post

mounts:
  post:
    - parent: base_link
      xyz: [0.0, 0.0, 0.0]
      rpy: [0.0, 0.0, 0.0]
      model: dual
      spacing: 0.12
      height: 0.075
  disk:
    - parent: post_0_mount
      xyz: [0.0, 0.0, 0.0]
      rpy: [0.0, 0.0, 0.0]

Attach an accessory to the disk post mount by setting the accessory's parent parameter to disk_0_mount.