First of all, WHMCS is not a part of WordPress and hope you know that “WHMCS is a Client Management, Billing & Support System for Web Hosts”. So, it’s not possible to put WHMCS template in WordPress.
In our demo we have used a separate domain and installed the WHMCS template there. After then, we have changed the WHMCS template’s menu URL based on the WordPress theme menu URL.
If you want to use/access the WHMCS template separately like our demo, then you must have to customize the WHMCS template, specially the header, footer & color of WHMCS template based on your website header, footer & color. Also, need to update the menu links based on your website. Moreover, we already described you the installation steps.
By the way, we saw that maximum of our clients using WHMCS Template separately like our demo. However, our theme also fully compatible with WHMCS Bridge Plugin to connect the WHMCS Template with WordPress.
Mainly, WHMCS Bridge Plugin connect WHMCS in WordPress like an iframe without header & footer of WHMCS template.
So, you could choose a way from both to use WHMCS Template with WordPress. It’s up to your choice, how you want to use. That’s why, we are providing WHMCS template separately with our Theme.
Best Regards,
ThemeLooks Support Team