Casio QT-6600 Service Manual page 37

L. Assembling the B-case Assy Block
L-1. Plug the connector to the Speaker and engage the B-case Assy Block.
NOTE: Insert the B-case in the groove of the Card Cover.
Connector (Speaker)
L-2. Secure it with 12 screws.
Screws (S1)
Screws (S2)
Screws (S3)
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