How to claim SEFI tokens (Keplr x MathWallet connection)?

Hi, I use Mathwallet to stake my SCRT tokens since a long time ago. I’ve read this post: SEFI is Live on Mainnet! - Secret Network and it says that we can claim our SEFI tokens by connecting the Keplr wallet. As I never used Keplr, I don’t know what to do. Maybe I need unblock my SCRT address inside Keplr providing my secret key. But I didn’t find this option on the Keplr wallet. Can anyone help me please?

I got it. Using my Mathwallet seed I was able to restore my Secret wallet on Keplr, then I was able to connect the Keplr wallet to receive the genesis tokens.