Upgrading HU in my 200 cup

Guys, just about to order this head unit http://www.caraudiodirect.co.uk/bluetooth/head-units/alpine-ute-72bt-media-receiver I currently have just the bog standard single cd head unit, but it does have the controls on the steering column which I'd like to retain.
So will I need an adapter to enable me to retain these? If so which would it be as I'd like to buy everything all at once :smile:
I've had the stereo out and there's nothing special behind it connections wise just imagejpg1_zpsb761c643.jpg

imagejpg2_zpsc12bed4f.jpg

And the HU it's self.. imagejpg4_zps6b8a5e1d.jpg

Any help on what to buy would be great :smile:

Thanks.