I concur with the advice above : one speaker cable with a 1/4 mono jack at each end is all that's required. It can be plugged into either of the cab sockets; these are doubled up to give the option of linking to a second cab, if desired. This is called 'daisy-chaining'. Probably moot in your case, but one should be aware that the total impedance of cabs connected in this way must not be below the minimum impedance of the amp. Two 8Ohm cabs connected in this 'daisy-chain' fashion would present a 4Ohm load to the amp. If the amp supports this, all well and good. If not, expect costly 'magic smoke'. The 'Baby Bomb' pedal amp, for instance, will not support two such cabs (the output socket is labelled : 8-16 Ohms...), but your single cab should be fine. Ignore, then, the second cab socket. Hope this helps.