To install RocketMod Plugins it's necessary to first install OpenMod which is the new .NET Framework for Unturned (Since RocketMod was discontinued). OpenMod offers support for RocketMod and a platform to build new plugins using a new structure. The following guide will explain how to install plugins using OpenMod.
WARNING: Your Game Panel credentials are different than your Client / Billing Area ones. You should've received an email with the Login Credentials for the Game Panel upon ordering and being deployed.
Step 1: Log in to the Game Panel with your credentials.
Step 2: Go to the Mod Manager and install the OpenMod Server Modification.
Step 3: Go to the Configuration Files section on our Game Panel and modify OpenMod to your liking.
Step 4: Go to the Plugins Repository and copy the install command provided there.
Step 5: Using MCRCON, log into your account and run the command the page gave you (It will be on your clipboard, simply paste it on MCRCON).
Step 6: Wait until it's installed and you should be good to go.
You can find more information in regards to the OpenMod Plugins Installation process over at their Wiki/Docs.
If you get stuck anywhere, feel free to contact Customer Support for them to assist you.