Hi, I've read some great posts on the forums but still can't fully answer my hopefully simple question.

I'm installing a fiberglass shower in my basement and picked up an ABS screw-in drain for it to connect to my abs drain pipe. The drain came with a rubber gasket, I'm wondering which side of the shower should the gasket go?

Should it be, from the top:

== drain cover ==
== abs screw-in drain ==
== rubber gasket ==
== fiberglass shower ==
== abs drain ==
== pipe ==

Thanks for any replies.
-Todd