installing new headliner , have the barbs over front doors ,tack cardboard strips at front and rear glasses ,but on each side by rear seat there is nothing to retain the liner. does anybody have a picture of what is supposed to be here . The liner was out by the time i got vehicle so i did'nt remove the original to know what should be there . all the interior is brand new and in, but the headliner is not stretched due to nothing on rear sides.Also how does the def/heat **** remove , i have all the rest off to paintdash , but do not see any retention device