The best explanation on how to install the secondary canister is provided by
Jerry. Very appropriate here for backup information
I have installed NEW canisters with the linkage arm straight contrary to what is/was normal (
the original canisters were properly installed with the linkage arm at an angle).
I have also modified the canister arm for an original installation so the arm did not contact the canister arm opening. Secondary Canister Installation TIPS
Both installations seem to function without any interference.
But for the record see Secondary Canister Installation FACTS TIPS