I had the same problem, bought it all new....I 'think' they are supposed to screw onto the bottom of the cowl ,( so when you lift it out they come with it), but I did install mine onto the top of the firewall directly w a screw and washer..., you can see where there are 'cut outs' locating them on the inside of the firewall...one pokes thru the 'long opening' in the cowl at the center , but close to the edge at pass. side...the other sprays thru the 'grill' work , you will have to adjust it right after installed ( maybe thats why it would be attached to the bottom of the cowl...?),so it doesnt hit the grill parts... take the cowl out , if I remember right 4 screws, then just be careful re-installing it , needs to fit in under a couple of clips at the ends , under w/s frame.... Bjorn 69 vert.
