At one of the gib screw locations make a custom screw that is long enough that is goes through he gib but doesn't touch the way of the table. Drill through the screw so the hole is used as an oil port. The attach the oiling mechanism to the screw head, the other end delivers oil to the desired location.
The srcew is longer so it can cross the air gap between the gob and the saddle, and deliver the oil to the way of the table.