HP Princeton HP-21 - Manual (Page 6)

Digital Piano Set-up Guide
2. . Follow the illustration below to setup your piano.
A.
Put the foot pedal unit(6) in between the left and right legs (3&4) . Use 4 screws (2 on each side) to
attach the legs onto the foot pedal unit.
(Make sure the position correct before tightening screws)
B.
Use 4 screws (2 on each side) to tighten the back panel (5) onto the
finished assembly in Part A.