Media Storage mapped mount on Windows

Hi,

I'm trying to share projects locally (on the same LAN) with the Project Server Application between some Mac and some PC. I know that I need to set the mapped mount in the Media Storage System Preferences (or is it better to set it in Project settings instead?).

On the Mac, there's no problem, I can double-click the Mapped Mount column and type my alternate file path. However, on the PC, in the Media Storage section, after adding the path, in the mapped mount column, instead of having a double-clickable field, I have a Browse button and when I click it I can only select paths on the PC, so it's not possible to enter a Mac path. Why it's different on the PC? What I'm doing wrong?

For exemple, I want to map:

Mac
Media Storage Location = /Volumes/video_share
Mapped Mount = Q:

PC
Media Storage Location = Q:
Mapped Mount = /Volumes/video_share

Is this OK? Do slashes directions are important (backslash vs forward slash)?

Thanks!

I'm not in front of my boxes right now, but yes the slashes are a different direction on the mac than the PC. I've never had trouble double clicking in the pc to enter my paths.
I have 2 pcs and 2 macs, all on the same storage, all using the same data, so it is very possible.

Here's a screenshot showing the problem (the Browse button, instead of an editable field):