Line running to other side of engine was probly to head and fed rocker's as orig path may have been blocked. We discussed this on old thread somewhere here. Aftermarket kits used outside line to get oil to the rockers. You run a pressure/pump test with drill to chck for oil feed to top?
I'm thinking that both those lower holes are returns to pan. Upper one is in the oil gallery that feeds to all engine prts.
Those side holes should be "Engine Mounts" not "Motor mounts". This is an engine, motors are electric!
One other thing.....Engine won't run/start with all that tape over the intake holes! :p