Cable Harness Assembly and It's Importance | Wunsch Once the design is automated, the process of making a wire harness begins with the construction of a scheme that is used to make the production paperwork and the assembly board for the harness. The assembly board also called the pinboard is a full-size layout of the harness and displays all of the components and their respective locations. Creating photo templates of harness boards Creating photo templates of harness boards . Step 2: Build up your harness board using easy-wire components. Mount the easy-wire components directly on top of the reference drawing, poking the pins of the bracket bases through the drawing and into the grid tiles.