ash tray and ac question

[robertmark]

My 69e targa has a ac system installed by the dealership after two months of ownership. I want to remove it. Luckily the prior owner kept the long trim pieces that go into place where the current ac vents are. It appears they mounted the plastic piece that holds the ash tray to the ac vent. So the ashtray swings down. Will I need some kind of a piece to hold the plastic piece that holds the ashtray? Or does the plastic piece that holds the ashtray get mounted to the underdash? I hope this makes sense. I barely understand it. Thanks!!!