Panasonic SB-PS40P Service Manual page 5

Assembly as arrow shown.
1.3. Disassembly of Woofer
Follow (step 1) to (step 2) of Item 1.2.
Step 1: Detach the (+) white and (-) blue wires from the Woofer.
Step 2: Remove 4 screws from the Woofer.
1.4. Disassembly of Network Assembly
Follow (step 1) to (step 2) of Item 1.2.
Follow (step 1) of Item 1.3.
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