Follow the assembly diagram for the manipulator, the instruction is to open the back cover of the servo and insert the cable in. But on the servo I have (photo below), there are a few set screws on the back cover and it seems to be a full piece I can't remove. Would you please comment on the further assembly? The manipulator assembly procedure is too terse to follow.
The official OpenMANIPULATOR-X is designed for XM430 series.
In order to pass the wire through the back cover, you should refer to the XL430 eManual