The cable itself is the usual high quality I've come to expect from Segway. I needed this cable to complete the upgrade of my Go-kart Pro to Go-kart Pro 2. It does connect into the S-max but not securely. The plug is too long and will not screw into the S-max. It is actually longer than the one it replaced. Not sure if there was a desgin change that necessitated the longer plug for the S-max. For now it is held in place by friction and is working. I have my 27mph speed!