need help 96 civic 1.6 v-tec

[RSXt3]

hey i just changed my engine i have two problems.
the first on the back of the engine on the wiring harness right in the middle there are three plugs coming out one goes to the block temp sensor, one goes to the crank pos. sensor, but i cant figure out where the other one goes. its a really short wire, the plug has two prong holes but its a single wire.
the other is on the very top back of the intake mani. that sensor has a line for a tube pointing down. i have the tube but dont know where the other end plugs in to. its a rubber line and has a plastic piece on the end as if it plugs into something.