Membership 2 Pro signup button

I have created a page in leadpages where a person can buy a membership to the website I have created in Wordpress using Membership 2 Pro. I would like to make it so the leadpages button takes the person directly to the purchase portion instead of going to another membership page (i.e. person clicks on button and it takes them to payment).

I have it setup with the paypal single pay option, but when I am looking at the membership options, I only see shortcodes that create buttons. How can I get the link for a customer without using the shortcode that creates a button?