on mine the oil feed comes from a regulator thats been tapped into the block under the manifold & returns to the sump
my water lines come in & out of my remote thermostat on the other side of the motor. on my gt28 the water lines sit one above the other with the top one being the inlet (i think)
ive got some pics but they arent the best...you can kinda see what i mean but i'll try and get some better pics tomorrow
you can clearly see the oil feed line in the top pic but the return is obscured. In the second pic you can just make out the thermo under the malpassi/inlet but the water lines to the turbo are also obscured
EDIT: trying to locate a decent camera...the only spare time i get is at night time & my camera phone is shite