Wiring cover for firewall

[stilllearning]

working on an s52 swap and I just got the rest of my parts. I had ordered the two wire covers 51 71 1 380 392 and 51 71 1 380 391. I looked at them and think I am missing something. Is there something that should bolt to the blower cover for the one piece to mount to. I wanted to make sure, bc I plan on putting in the motor this weekend and didn't know if It needed to be on before.

[bdi_fc]

working on an s52 swap and I just got the rest of my parts. I had ordered the two wire covers 51 71 1 380 392 and 51 71 1 380 391. I looked at them and think I am missing something. Is there something that should bolt to the blower cover for the one piece to mount to. I wanted to make sure, bc I plan on putting in the motor this weekend and didn't know if It needed to be on before.

After cutting all of the little prongs off the firewall, my cover screwed into the place where the M20 C101 holster went near the fusebox. It also screwed in on the other side in a random spot that I can't recall. :o