XCM Core Cooler Version 2 extend the wires?

[cyberboy109]

Iv moded a few consoles before so I have rough idea wat I'm doing but wanted some advice
Any way I was gonna buy one of thoose xian Li towers and also fit a XCM Core Cooler Version 2 but the wire will be to short any ideas on wat type of wire I should use to extend the original......
Thanks for the help sorry about my spelling and grammer