Cut out a small piece of double-sided tape. The tape should be of the “foam” type, around 1mm thick. The latest releases of the LPVR Varjo kits contain a piece of tape for this purpose.
Attach the double sided tape to the upper part of the Varjo HMD marker holder.
Peel off the cover of the double sided tape.
Attach the upper part of the Varjo HMD holder to the Varjo HMD.
Attach the lower part of the HMD marker holder to the Varjo HMD.
Fix the metal screws (left and right side) holding upper and lower part together with a screwdriver.
With this the Varjo HMD marker holder is assembled. You can now attach marker poles and marker balls to the holder.