Adding AUX input to MFD2 headunit

Hello, I've just bought a 2007 Jetta TDI 1KM Manual MY08. It has factory MFD2 Nav with 6 CD changer in centre console.
Is there a way that I can install an AUX port into one of the blank buttons behind the gear stick, and not have not compromise by getting rid of the CD changer or anything else?

I've found this but not sure if i should buy it before knowing whether it's compatible or not:
Aux Port | Double Apex

Any help would much appreciated as I'm fairly new to all of this!