Seem to Be Missing a Servo Motor

I am assembling the Lynxmotion AL5D Robotic Arm with Rotate Wrist Upgrade. I am currently trying to assemble the wrist. It illustrates using an HS485HB servo. However, only one HS485HB Servo came in the package, and that, per the directions, was used in the base. Should I have two HS485HBs? If not, what servo should be in each of the two locations.

As a follow-on…this is a really non-user friendly way to conduct tech support.

Hope this helps:

1 x HS-485HB in the base
1 x HS-805BB (or equivalent large scale servo) in the shoulder
1 x HS-755HB in the elbow
1 x HS-645MG in the wrist
1 x HS-422HB in the gripper

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