I've activated the CC on a 2015 CVT. I found that my car had the wiring already, I had to buy the keypad to fit the steering wheel online.
I contacted Mitsubishi about buying the keypad from them but they would only sell it with the leather wrapped steering wheel attached....
I bought a MUTIII clone online to reflash the onboard computer as the dealer wouldn't work on it/reflash it with my keypad fitted, they asked me "does it come with instructions?" There was a russian website that was helpful to me, but I also had an old laptop that still ran win98 and that is handy too.
All of this is if you want the OEM look, if this isn't important you can get an aftermarket kit, it would probably be easier.
In your case the manual transmission will need a switch mounted on the clutch pedal.
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View my fuel log 2015 Mirage ES Plus 1.2 automatic: 38.0 mpg (US) ... 16.2 km/L ... 6.2 L/100 km ... 45.6 mpg (Imp)