radio upgrade

[goatiegoat1]

I returne an android after market and received replacement. We put the original in a 6 months ago and can't figure how to get the knob out of the old frame and into the old. my son seems to remember taking cover off knobs but how

 

[SitKneelBend]

I returne an android after market and received replacement. We put the original in a 6 months ago and can't figure how to get the knob out of the old frame and into the old. my son seems to remember taking cover off knobs but how

It should just be screws holding it in place. Can you post a picture?