Dash Bezels?

[Marv]

Could someone explain how to remove the dash bezels for a 70 Javelin ? Do they just push out. I noticed there are 4 what look like tabs sticking out thru the rear of backing. Should I just push on each one of them and wiggle them out. I dont want to crack the plastic. Newbie here ,,,thanks,,

[Kamlica]

Im fitting a new dash board and as Im not having a radio will use the radio blank as supplied with the dash. Could somebody tell me how this should be attached to dash.ThanksAlan.