How To Install A Faucet
Part 1: Looking at your faucet... surprise!
Depending on the day and my supply of aspirin... getting under the kitchen cabinet can be the hardest part of the job! Oh for a shrinking pill (Go ask Alice... I think she'll know)!
This is not the only possible configuration you may see. Some upper-crust faucets have physically separate spouts and shutoffs. Others utilize combination mounting bolts and inlet nipples... short threaded pipes that do "double duty".
Here are drawings these three common types...
These drawings provided
courtesy of Delta Faucets