EDIT: I found the instructions after digging around.
2. Enter the Airdrop contract address in the address field. The contract's address is 0x08fd34559F2ed8585d3810B4D96Ab8A05c9f97c5
3. Paste the ABI/JSON code written below in the 'ABI / JSON Interface' field
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4. Click 'Access' and select 'claimClusters' or 'claimSegments'in the dropdown box.
5. Click 'Write' and 'Generate transaction'. You will send a small amount of Gas for this transaction.
6. Your rewards will be added to your wallet if you have added the token.