Claim BCH with Electrum wallet
Where have your BTC been on Aug 1? That's deciding.

If I understand it correctly, you created a new BTC-wallet and sent your BTC there. But your BCH are still on the adresses on which your BTC have been on Aug 1.

So you need to get the seed of your older wallet (where they have been on Aug 1) or (if you did not use a HD wallet that time) you need to get the private keys of the adresses of the old wallet (almost wallets allow you to export them). You can import them in Electron Cash then.