DJM 800 recording set

so i'm kinda new to all these dj'ing stuff, but i have a pioneer cdj 1000mk3 set with djm800 and i have 2  speakers , now i'm wondering how i can record my sets , i have a Midi to usb cable but it has 2 midi (ports) and theere is just one midi out port on djm 800.. can someone please explain how i will be able to record my sets :/ maybe even with links of hardware i need to buy :/  i want to use it with traktor