can anyone explain the pipes from the metal hard pipes that go to the vac pump and fpr, ive heard of bypassing it, split pipes etc etc

my metal hard pipes have oil ontop of them....why could that be

i have 1 vac pipe from the left metal hard pipe to the fpr, and 1 to the vac pump from the right hand metal hard pipe

if that makes sense, worried about the fresh oil on the metal hard pipes....

help appreciated