Meo Wallet change the default_method to Credit Card CC

Hello, i am trying to make the credit card payment by default instead of the Wallet to be easy to my clients to use the credit card. I put this line of code
‘default_method’ => ‘CC’,
but didnt work.

I am using woocommerce and the code ‘default_method’ => ‘CC’, i inserted in the meo wallet plugin file
meo-wallet-wc/class/meowallet.class.php
and created a new Api Key and change with the original.

Any ideia or pointing me a direction?

many thank
Fernando