Not sure where did these guys got their guide from. But generally if you placed all your bitcoins inside private keys before the August 1 split, then you will get BTC and BCC in that private key.
Also, do not trust electron cash, that is a fork from eletrum wallet. Electrum has already denounced that wallet and there is a chance your coins might get stolen as the source is unknown and possible the dev can steal your bcc.
Yep they were all in a private key before the 1st
Guide I followed was from Electrum themselves
https://electrum.org/bcc.txt. Moved my BTC to another wallet after the fork so that should be safe. Loaded my original key into Electron cash and expected to see my remaining BCC cash but its empty.
EDIT*
Got my BCH now. Electroncash default server is a BTC (bitcoin) not a BCH (Bitcoin cash) server. Click on the network icon and de-select the "select server automatically" box and select a server on the BCH blockchain ( right click>Use as server) and my BCH have appeared!