Startup properties

I currently got mods installed, which don't show inside the game. I know that you have to add it to the startup properties, and I also did it before in the Origin app, but since they brought up this glitchy EA thing, I can't add "-datapath "C:\Program Files\EA Games\STAR WARS Battlefront II\ModData\Default"", because it says that the commands contain an invalid character. I don't know who had the idea to add "invalid characters" to a command line, which's half persists of special characters, but it's obviously not working. Everything worked fine before in the Origin app.