How to connect power supply to footswitch

hi ctc forum,
i recently bought a fame dc jr power supply to use with my engl z12 footswitch. the midi cable i use to connect the footswitch to the amp also has a dc plug, which allows me to power the switch at the amp and place it more freely. the problem is that the cables which where included in the powersupply dont fit iin the plug on the midi cable. any idea what cable i need to set everything up?
if it helps i can upload pictures of the plugs and cables aswell