Can I link to a unique url utilizing my affiliate id?

Hi,

I would like to link to a particular wpmu plugin while using my affiliate id.

For example:
I would like to link to: https://premium.wpmudev.org/project/pro-sites/ but using my affiliate is which looks to be: '?ref=webdevusa-36397'

just want to know where I should be putting this ref id in the url so we can still get credit for the referral/sale.

Thank you.