Challenger 210 rear deck facing cushion removal

[Orclman]

Hi,

wondering if there is any info on how I can reattach a rear facing cushion that is held by 2 metal forks at the bottom and 2 snap in plastic anchors at the top.
I can not get the plastic anchors in.

TIA

 

[doodooboat]

Got a picture? I just redid my interior