Join the Clean Section with the Dirty Section
Almost there! To install the extra bobbin brace on the dirty section, you'll need to remove two of the outer screws from each of your front arms (if your arms are already installed). These screws will be replaced with the m3x8 in order to fasten down the small bobbin brace on top of the arms of the dirty section. Please see the image below.
Line up the bobbins of both the clean and dirty sections and bring them together. Secure the bobbins into place with regular nuts as you did before on the clean section.