English to Italian Tech/Engineering Engineering (general)

1.
Remove the outermost pivot pin from the blue Support Arm Yoke mounted to the back of the Electronics Enclosure in the upper-left corner (see Figure 3-3).
To do this, loosen the set screw securing the pivot pin.
2.
Attach the Optical Bench Assembly to the Support Arm Yoke by fitting the Optical Bench Support Plate to the Support Arm Yoke and securing it with the pivot pin.

si tratta di un braccio di supporto o è qualcos'altro?

grazie in anticipo