Supra SL Owner's Manual page 68

Battery Box
The battery is mounted under the port side cushions.
Location may vary slightly depending on the model.
NOTICE: It is recommended that the battery cables be
disconnected from the battery when the boat is placed
in storage.
Avoid damage or injury from battery acid. Ensure that the
battery is properly secured before using boat.
©2017 Skier's Choice, Inc.
Dripless Shaft Seal
Your Supra comes standard with a dripless shaft seal. If
any seepage occurs, contact your dealer.
Component Lubrication
Normal use of your Supra causes metal to metal movement
at some parts in the boat. The driver's seat track should be
lubricated with a water resistant chassis lubricant such as
silicon grease.
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