Volvo VNL Operator's Manual page 300

On a vehicle without air fairings, the bat-
tery cover is also a base for the cab steps.
To remove the cover, unhook the two rub-
ber latches and lift the cover up and out.
When installing the battery cover, make
sure it is resting properly on the box
before fastening the latches. Faulty in-
stallation may cause the cover to shift
when the steps are used, which may lead
to a fall, causing serious personal injury
or death.
There may be three or four batteries in-
stalled. Always make sure the batteries are
fastened properly in the box.
When disconnecting battery terminals, al-
ways disconnect the main ground terminal
first. When reconnecting, always connect
the main ground terminal last.
Electrical System 295
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W3002368