Washer pump (manual) location??

I'm trying to get my washer system working as original after some dolt attempted to convert it to an electric pump. It's a '68 Barracuda FB. I have the manual rubber washer pump setup from a '70 Dart and was told they would be the same as what my Cuda should have. However, after pulling up the carpet, I can't figure out how or where it is supposed to mount to the floor/firewall. Do they interchange? Anybody have any pics of their manual washer pump installed?? Thanks.