No power after both battery's was disconnected for ac pump replacement

Do you have a scanner any codes? When you put the orange plug back in the HV battery in the trunk The plug goes behind the driver on that side of the battery The last part of putting that plug in is to push down on the hoop which locks the plug into the receptacle that tells the car the plug is there sometimes on this last step you have to almost feel like you're breaking your finger in half to seat the hoop on the plug correctly You see how it flips around and drops down in your hand right That's to be open to put it in and lift up and slam it down to lock it in place this is the step where most people mess this up You may get some array of lights on the dash but the car won't start or go ready reseat that orange plug.. now will it get out of the alleyway?

 

All that is to say, did you do step three? It needs to click down to lock.