Remove The I/O Board Cable Brackets - Lenovo Chromebook Duet 5 Hardware Maintenance Manual

Figure 8. Remove speakers
Go to https://support.lenovo.com/partslookup
replacement parts:
Speaker

Remove the I/O board cable brackets

Make sure the following FRUs (or CRUs) have been removed.
"Remove the LCD module" on page 26
Step 1. Remove four screws, and then remove the I/O board cable brackets.
Figure 9. Remove four screws and the I/O board cable brackets
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Lenovo Chromebook Duet 5, IdeaPad Duet 5 Chrombook (13", 6) Hardware Maintenance Manual
to look up the Lenovo part numbers of the following