From the bag labeled: "End Effector Rebuild Kit", remove the 3 pieces of the end effector housing.

NOTE: It may be easier to install these nuts and screw one at a time.

Insert 6x M3 Nuts into position shown.

Secure nuts in position with M3 x 8mm SHCS, threaded in 3-4 turns.

We are just using these M3 x 8mm SHCS to temporarily hold the M3 nuts in place; they will be removed later, so no need to tighten the screws all the way.

Alternative technique would be to slide the assembly off the table and insert the screws from the bottom, using gravity to hold the nuts in position while the screws are installed.