HI…I NEED TO KNOW :DO ALL THE CONNECTIONS FOR THE THERMAL FUSE GET DONE INSIDE THE DOOR OF THE UNIT ?? 
The new thermal fuse comes with the installation instructions.
- The thermal fuse AP3115186
Here are the breakdown diagrams and Replacement parts for WHIRLPOOL DUL200PKB1 UNDERCOUNTER DISHWASHER | AppliancePartsPros.com
Gene.