To use the portal you will need your serial number.
Your serial is a 17 digit number beginning with 5KT... The serial number can be found on the outside and inside of your trailer frame, or on the registration forum.
When you get to the portal enter your serial number into the box labeled “VIN Number” and then select “Apply & Run Query”.
This may take a minute.
A list with multiple pages will appear. The list of parts are all the parts that your trailer originally was manufactured with. This will not include accessories that were added on afterwards like spare tires etc.
Once you found the part you are looking for you can select “View Drawing” and you can download a drawing of the part.
Not all trailers will come up in the portal. There is a cut off point at older than 2005.