Share (read-only suggested) the root of the drives you want to scan over network. Name them as driveC or something.
(sharing: right click on the drive, select the "sharing" menu item or Properties, and "Sharing" tab. Choose the "share this folder" radio button, put a name, set a sharing mode (read only suggested). Press OK
Map the drive:
On the computer with the antivirus, start a Windows Explorer, explore in Network Neighborhood to the computer you want to scan, right click the driveC "folder" on it and select "Map network drive". Select a drive letter (like Z🙂 and press OK
Afterward, you can scan it just like any other drive
Calin