Step 3Soldering
It's important to make sure that you connect properly. To do that, we need to find out which wire is positive and which is negative. There are a few ways. Usualy, the pos is white and the neg is black, if they are not marked, look for a white stripe on one of the wires, that one will be positive. If you're still not sure, you will have to plug it in to the solar panel, and use a multimeter on the bare wires.
Drill a small hole somewhere in the casing for the quick connect to come out of. If you don't want to drill a hole and don't mind if you can't use the charger for your car ever again, you can just exit the wire through the shaft.
Now, pull the wires through the hole and solder it together.
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