E-flite Divo 3D - Manual (Page 10)

10 E-flite Divo 3D Profile Assembly Manual
Note: The longer side of the triangular fuseselage braces
are against the vertical fuselage, and the shorter edge
against the horizontal fuselage brace.
 8. Align the stabilizer square to the vertical fuselage.
Apply a few drops of foam-safe CA to glue the stabilizer
to the vertical fuselage.
Hint: Use low-tack masking tape to hold the fin/rudder
and stabilizer/elevator in neutral. This will make the
assembly of your airframe slightly easier than if they are
moving about while handling the airframe.