Solder connectors have flux and solder already inside of the connector barrel just add heat.
Solder on battery cable ends.
Screw on battery terminal lugs insert your stripped cable into the compression nut and tighten.
A basic battery terminal crimper or battery cable crimper can complete the job.
Copper crimp or solder battery terminals allow for the highest conductivity and are ideal for automotive cars marine boats motorcycles recreation vehicle applications.
Battery cable lugs also known as battery lugs or cable ends are the main connection point between the battery cable and the battery system.
Quick cable 426320 2001p fusion solder left elbow clamp battery connector 2 0 gauge positive polarity tin plated copper alloy 2 5 64 length 1 27 64 width 5 0 out of 5 stars 1 5 18 5.
Battery cable ends or battery cable lugs are offered in a wide range of materials performances gauge sizes and stud sizes.
No crimping or heat is required.
Selterm ul listed marine grade wire lugs battery cable ends tinned copper eyelets tubular ring terminals closed end crimp connectors 8 awg to 250 mcm 4 7 out of 5 stars 1 304 12 01 12.
The straight barrel style gives you a straight connection between battery wire.
The smarter thing would have been to solder copper lugs onto the cable ends.
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.
Then use wing nuts to clamp em down to a pair of these battery terminals or better yet these awesome made in usa ones.