using a UNC in Linux

I decided to buy a cheap used computer and start playing with Linux again. I currently have Mint 17.3 installed. I've successfully installed Serviio with no issues. However, rather than copy a bunch of media files to this computer (with it's ancient hard drive that could fail) I just wanted to connect to one of my other Serviio boxes. I added the usual UNC (\\computer_name\Share_name), but it is getting changed in the Serviio console once I hit Save. It now shows:
Why is it adding the local home path for my user into the console? This behavior doesn't occur with Windows. Anybody have any ideas? I tried mounting the network location to this computer, but then it wouldn't fully boot. I know it's been a long time since I've used fstab and VI, but it doesn't seem like things have changed all that much.
Why is it adding the local home path for my user into the console? This behavior doesn't occur with Windows. Anybody have any ideas? I tried mounting the network location to this computer, but then it wouldn't fully boot. I know it's been a long time since I've used fstab and VI, but it doesn't seem like things have changed all that much.