Is this for a bp or b6?
perhaps if you had given us some info you woulda got an answer.
also go make a sig with all the info so you dont have to remember to put in the info everytime.
leave the water/oil heat exchanger.
some of us are nice to newbies
b6: theres 2 bolts on the hotside of the engine near the firewall under the heater lines.
one bolt is above the other its the top one you wanna take your oil feed from.
for the return line there is a pipe with a rubber cap on the coldside, that when removed will fit up a 3/4" returnline. pretty much everyone with a b6 uses this without problems. some drill and tap their sump but its totally unnecessary and only done by ricers who want a less cluttered enginebay.
basically you wanna stack sandwhich plates do not drill and tap the current one get atleast 2 more sandwhich plates ideally 3. you may only connect up one extra now but youll need them later. it also comes with the benefit of easier oil filter changes.
for the oil return you have to tap and drill the sump the good news is cause the bp uses less oil pressure you dont need as big of a return line as the b6 so you can get away with -6an return line.
Goodluck with the build