The easiest way to send RCON commands to your server is to click "Current Activity and Stats" and then click "RCON Client" on the hot bar; you then simply type in the command you want to run.
To find the RCON commands themselves, we recommend searching our Knowledge base for the game in question. As an example: https://pingperfect.com/index.php/knowledgebase/101/Counter-Strike--CSGO--RCON-Commands-List.html
Please note: If the "RCON Client" button does not appear, that is because the game does not support RCON (or the game's RCON implementation is temperamental/buggy/broken etc.)
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