How to replace wires on 1998 caddy ecu?

Hi I was having trouble removing the air box, and stupid me tried to remove the container with the ecu in it, in my 98 cadillac deville, unfortunately I tried cutting the wire harness while doing so think in was a hose for air or something, So i cut about 11 wires in doing so. The car started making noises right after i cut the wires. my question is what do i do to fix this? I cant see where the wires are going to and if i remove the ecu what will happen? and how do i get new wires?