The smarter thing would have been to solder copper lugs onto the cable ends.
Solder on battery cable ends.
Copper crimp or solder battery terminals allow for the highest conductivity and are ideal for automotive cars marine boats motorcycles recreation vehicle applications.
Then use wing nuts to clamp em down to a pair of these battery terminals or better yet these awesome made in usa ones.
Parallel flag style terminals feature a special design allowing up to 2 wires or cable.
Battery cable lugs also known as battery lugs or cable ends are the main connection point between the battery cable and the battery system.
Solder loaded battery terminal lugs when heat is applied the flux and solder mixture creates a metallic bond that is nearly twice as strong as crimping or compression connections.
The straight barrel style gives you a straight connection between battery wire.
A basic battery terminal crimper or battery cable crimper can complete the job.
No crimping or heat is required.
Screw on battery terminal lugs insert your stripped cable into the compression nut and tighten.
Make sure the lugs are made for the size wire you re using.
Fusion solder battery terminal clamp and copper tube lug connectors.
Solder connectors have flux and solder already inside of the connector barrel just add heat.