Just added all new fuel lines and had to add the oiler back to this bike was removed. And had to add the intake manifold due to the person b4 me filling the old hose barbs with jbweld. So anyway I have a parts bike luckly.

My question is what is the holes on the manifold w/ the black caps on 2 and my pto cylinder had a hose on it but was already snipper off . is this important???? I used a different cap and capped it.