Line up the 2 pieces of truss that will be connected. One truss should have the couplers attach to one side and the other truss should have open ends to receive the couplers.
Push the 2 pieces of truss together.
Insert the pin into the tapered hole.
Attach the r-clip to the pin to secure and prevent the pin from coming out of the truss.
Tap the pin with a hammer until the hole for the r-clip is visible on the side.