VY SWI installation into Sony MEXBT2950 head unit

[schoey3]

Hey Guys,

I am sick and tired of my Steering wheel controls just sitting there, i have a sony MEXBT2950 head unit and was seeing if someone could refer me to a SWI that i connect and not have in the open?
i have had a look myslef and all of the need a AUX jack is that true?
if it is, is there a way to connect via the back of my head unit?

thanks from
schoey3

[schoey3]

head unit link:
MEX-BT2950 : Xplod™ CD Receivers : Car & Marine Entertainment : Sony Australia