i wont have any oil coming out when i take out the oil sensor, correct? also i noticed that it seems that my oil filter is in the way. can i rotate the connector so that it will fit??

also as i was looking over the cheap diagram my gauges came with, i noticed that i need to connect both to the ignition switch. what exactly does that mean?? and can i connect just one, then connect the 2nd one to the first one, for simplicity? or is it better to have a wire for both. thanks, guys