Bond The Carbon Square Tube Onto The Fuselage. - Click 3D Install Manual

3. Grind the 3mm carbon tube in the accessory package with
sandpaper, and then insert the 4mm square carbon tube to connect the
two square carbon tubes; if the connector is stainless steel tube, insert
the two square carbon tubes into the stainless steel tube and glue
them.

Bond the carbon square tube onto the fuselage.

4.
5. Take out these parts and glue them together.