How to hardwire speaker box into old truck?

How to hardwire speaker box into old truck?
Added (1). Ok so i have a 86 Ford ranger that is a pos and so the radio doesn't work, but i have this old speaker box with a aux cord that is meant to be plugged into a wall outlet so i was trying to figure out a way to hard wire it into the truck because i only have one cigarette lighter socket and don't want to have to have it permanently occupied by a converter. Any help would be appreciated thanks.

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