I am doing a rebuild of a 05 Honda Rubicon. I am nearly complete with the engine. I am replacing the mainshaft bearing in the rear cover using a hollow blind bearing remover. However in the process the boss on the rear cover in the ID of the bearing broke off. This boss does not appear to support the main shaft but I suspect it helps to control the flow of oil. Does anybody know the function of this boss? I am tempted to go ahead and install thinking the boss might be for another engine model with a purpose. Any thoughts?

PN 11340-HN2-A20