Rubber squares = possibly the shims between the gauge cluster and dash cavity. They should be glued to a couple of indents atop the cluster. Maybe a couple go below as well.

Motor = there's an aspirator motor below the passenger side vent that draws air across the cabin temp sensor by the dome light then exhausts to the blower casing.

Black vacuum line = there's a black vacuum line hanging open in the driver footwell. It's the collective vent for vacuum devices under the hood.

One way to share pictures is to upload them to a site like Photobucket then paste the image link within [img] [/img] tags in a post.

Sixto
83 300SD
98 E320 wagon