How To Install Thermos
To get plugins to work on 1.7.10 Forge we'll need to use something called Thermos.
You can download this via our version installer, just select Thermos from the drop-down.
Head to this link: https://github.com/CyberdyneCC/Thermos/releases (opens in a new tab)
Then click on assets.
Here download the libraries zip and Thermos-1.7.10-1614-server.jar
Next, upload both of these to your server via the file manager. Once the libraries are uploaded right-click and press unarchive. Set the Thermos jar on the overview page, and you're all set.
You can now add plugins to the plugins folder in the file manager.