help!
 

i am looking over my engine today because its about 58 outside and its the nicest day we have had in MN since last fall. ha. but i was looking at my clutch master cylinder pump and the little connector coming from the cap was unplugged. i have been running it with this connector off all winter. should i plug it back in or not? and what does that connector/ wire sense or measure?

yes you should and youre probably looking at your brake master cylinder. It will trigger your warning lamp in your gauge cluster if there is a problem with the fluid level.