Configure WordPress Installation autoinstalls via Softaculous in WHCMS

I'm trying to create a fully managed hosting package for my customers within whmcs without giving them cPanel and WordPress admin credentials. Ideally, upon purchase of a hosting package in whmcs, I'd like for two credentials to be created: the admin credential to be sent to me (the designer/hosting provider) and a user with the WordPress Editor role to be sent to the customer.

I found the tutorial for setting up the Softaculous auto-installer in whmcs, but I'm not sure where to go (or even dig) to tweak it. If anyone can give me some direction (or even tell me what to research), I'd be grateful!