There are 2 ways of backing up your ZCL Electrum wallet. The first step is by heading into the Electrum wallet. Click on file and "backup wallet." Name your wallet anything, but make sure you back your wallet file up in a safe and secure location as it is a powerful file that holds all of your funds.
The second method of backing up your ZCL Electrum wallet is by navigating to the following directory: C:\Users\usernameXXX\AppData\Roaming\Electrum-zcl\wallets and in this directory you will see all of the wallet files that currently exist in your electrum wallet. You can choose to backup specific ones or back them all up for safekeeping and recovery.