[Al Skierkiewicz]

Although the Chalupa motors come with #14 wire, they are relatively short and so have little series resistance to cause heating. It is a good idea to move the Victors feeding your Chalupas (both the large and small) close enough to the motor so you can use the supplied motor leads without additional wire. As pointed out, if you are using these motors for drive they are best fed with a 40 amp breaker. I would go further and make the wiring to the Victor with #10 following the suggestions found in the Tips and Guidelines for wiring.
If you must add wire, then use approved splicing technique or add smaller connectors to the wire. We use the smaller Anderson Power Products connectors. They are polarized and do not require additional insulation.