Start Rust and join the server you want to link to.
Make sure you are already connected to the correct Rust server before you begin the linking process. The link has to be completed against the same server you intend to use.
Open the linking page.
Sign in with Discord to start linking your account.
Verify your account with Rust quick chat.
When the timer starts, open the quick chat wheel and send "Can I have a key?" exactly as shown.
Choose your player slot and continue into the portal.
After your verification is accepted, you will be taken straight to slot selection.