Yes, it is extremely easy to add multiple Wearable Mounts on your ALLDOCK.
If you have a purchased an ALLDOCK with a TIMBER TOP (Bamboo or Walnut), you have the flexibility to screw in a mount onto each of the dock rails (LHS) . Although there are no screw holes it is also possible to secure either the AirPod or fitbit mount on the (RHS).
If you have purchased an ALLDOCK with a Black or White Top, one accessory can be secured in the screw hole 3rd Rail of (LHS). For additional mounts (AirPod or fitbit) they can be secured on RHS. Refer to below illustration.