First step is setting the department to show online. They could either create a new department for this, or just use their existing sales department, set the "Sales Person Online" flag to Yes:
 

Then, on each web payment plan they will need to either just show or require the salesperson. This is on page 4 of the edit payment plan screen. As you can see, for West Orange they already have it set to shown (which means it's optional), but since they don't have an online department set up it doesn't show:
 

That's it. Once those things are done they can start collecting Salesperson just like they can in DataTrak.

The kiosk URL must have the clubIPad=true parameter or we will treat this as an online sale, not an in-club sale.

 

For example:

https://signup.myiclubonline.com/iclub/signup/home.htm\#plans?clubNumber=8940&clubIPad=true