How do I create more than one upload button on a single form (6 to be exact) and link to list columns.

You can have 6 different attachment controls on the Nintex form and make one of them as default.

Create the 6 fields in the list as hyperlink which is going to hold the url for the document.

Now using the workflow you can get the name of the attached document and create URL for each document location.

{SiteUrl}/Lists/(ListName}/{ItemId}/Attachments/{DocName}

Update the urls to the fields created

Thank you for your response.  I greatly appreciate help on this.  I will be sitting down today trying to implement this.

So placing the attachment controls on the form, give names for all the attachment controls.

Now while saving the form, you need to start the workflow to create the URL for each document. You have to extract the names of the attached documents from the FormData using the workflow. So

Use query xml control to extract the document name

Here is the setting

You can extract all the names from 6 attachment controls in same QueryXML as show above. Store them in 6 different variables.

Once you have the file names, you can construct the url and palce them in the hyperlink fields  that you created

You have a create a variable to store the values , if you have more than one attachment in single control. You will get the names delimited by ";"