Car wont turn over *FRESH REBUILT MOTOR*

So i put a rebuilt jdm b18b in my 93 integra. I started the car twice and everything seemed good .So i xecided to put the exhaust and everything back on. After that i got in the car and it wouldnt crank over at all. My radio, dome lights, clock on the dash, and fuel pump are no longer working also. (The dash lights do work)
amy ideas of what it could be???

Bump

This might help; https://www.youtube.com/watch?v=pbMVyQ8LNHk

There are A LOT of possibilities.

Good luck.