Always use a proper speaker cable like this to connect from amp to speaker. A guitar cable is NOT a substitute. Even low wattage amplifiers can send high-power transients through the cable which can overheat and even melt the insulation.
This cable uses highest quality jack plugs from Neutrik, which surprised me at the price. Neutrik, as anyone who works in audio electronics will know, make better quality connectors than the overpriced offerings from Switchcraft. After buying one Neutrik socket to replace a Switchcraft one in a Telecaster, I have since fitted ALL my guitars and many of my amps with Neutrik sockets.
Works perfectly and gives a reassuringly tight connection who's quality you can feel when plugging in.