Apply glue to the inner ring of the end effector and the 3 stand off mounts as shown.

Place plastic inner duct into circular indentation and line up the flat edge of the duct against the flat edge of the connector.

Press 3x M3 x 37mm standoffs into the plastic shell.

Set this lower assembly aside to dry. Minimum drying time 15 minutes, before additional handling. Do not place into enclosed plastic bag until degassing of the adhesive is complete (24 hours).