Connect HTTPS owncloud to HTTP onlyoffice Document Server

Owncloud Version: 10.4
OnlyOffice Doc Server: Docker Container on the Owncloud Server

I have the OnlyOffice Doc Server running and can connect to it through the browser. In Owncloud when I go to configure the OnlyOffice app and enter the server address I get an error that Owncloud won’t do Mixed Mode and connect to a non HTTPS server. Is there somewhere I can switch this off? It’s really not necessary as the onlyoffice doc sever will only be accessed locally by the owncloud server for document collaboration and online editing.