Brother P-touch BB4 Service Manual page 33

(6) While holding the bottom cover in an angle shown below, connect the head flat cable
to the main PCB.
(7) Close the bottom cover.
Figure 2.2-20 Connecting the Head Flat Cable
(8) Secure the bottom cover to the body cover with two screws, taking care not to pinch
the wires between those covers.
Figure 2.2-21 Securing the Bottom Cover to the Body Cover
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