Add a Homegroup member's files to OneDrive

[WiFi Ed]

I have two PC's, one with Windows 7 and the other with Windows 8.1. There is a Homegroup, both PCs are members and can see each other and share files, etc. The Win 8.1 PC has OneDrive up and running, connected to my Windows Live OneDrive account.

I'd like to add the Pictures library from the Win 7 PC (visible and accessible in Homegroup) to OneDrive on the Win 8.1 pc for automatic backing up.

Is this possible? If so, how?

Thanks in advance!