Ocularis Plugs need to be installed with the shoulder toward the target for Looped Tubes and on the shooter side for Flat Bands.
Have a new slingshot that uses Ocularis Plugs but having problems with getting them to hold? Here is a GREAT video demonstration on how to properly install the Ocularis Plugs. The demonstration is using the Axiom Ocularis cut it is the same technique for any frame that uses the Ocularis Plug attachment method.
Link to Axiom Ocularis Owner's Manual
Click here to watch the video demonstration installing the Ocularis Plugs