Serialnumber print in Invoice when inserted in Delivery

Hello,

i need an Idea to print the serialnumbers in the Invoice when I inserted them in the Delivery.

I think the form gets the variable from SRI1 BaseNum and BaseEntry if they are different from Invoice the Invoice Print doesn't get them....

I want to realize that the Customers ever see the serialnumbers on the Invoice if possible.

I´m open for any ideas...