Oil Pressure Gauge - Plastic Tube Removal

Pulled the Sun Oil Pressure gauge out of my dashboard only to find a tube with oil in it. I traced it back to the back top of the motor.
Is there a plug I need to fill where this tube is coming from? Does anyone know the official name of this plug (it's probably "bolt" :)) so I can search and find one? I guess I can't start my car until I plug up the tube....

Oh yeah... I have a similar tube coming from the radiator for the water temp.
This is probably a some sort of plug or bolt ... yes?

Thanks for any help you can give.... That oil pressure plug look like a pain to get to....