Pyle PLCAP50R Manual page 2

You must first attach the mounting tabs to the capacitor before mounting
it. Use the supplied hardware shown in the picture to the right. Notice the
small mounting screw hole in the capacitor chassis.
The capacitor must be charged before connecting the Power and Ground
cables to the capacitor. Failure to charge the capacitor will result in a
large spark generated from the rapid inflow of current.
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