Interlock receptacle replacement , code p0a0d

Hey everyone I got two questions. Our 2013 Prius three had been throwing some check hybrid system warnings, eventually stalled. We have been experiencing that along with a plastic/sulfur burning smell under high load from the front of the vehicle (thinking the Ipm issue). We towed it into a dealership for diagnostics and they pulled a p0a0d code.
The receptacle is broken on the outside, I believe a bit of plastic chipped off when we were messing with it trying to get off the road. They sent a picture of the recently chipped plastic saying that was the problem. The dealership states that in order to fix the receptacle the entire battery needs replacing.

Question 1 has anyone replaced this receptacle before? It looks like a 150 dollar set of wires with specific plugs on each end so it looks fairly easy to replace.

Question 2 would something going on with the inverter be able to mess with the interlock by the battery in anyway?

 

No it is a regular Prius three

 

Sorry I did a bit of a bad job explaining, let me give it another go.

we have been experiencing the check hybrid system warning, along with a strong burning plastic smell from the front of the vehicle under high loads, and the hybrid system shuts off. Usually unplugging the orange interlock and plugging it back in would reset the system, and the same warning would come back up at irregular intervals.

This last time though it put the car in a complete stall, the orange interlock was left off when we towed the car into the dealership.

The dealership called back and told us about the P0a0d code, and that the orange interlock was improperly installed, and that the receptacle (the black plastic it plugs into) was damaged, the poles were failing to line up and it is non serviceable and would require a completely new battery.

So my questions are:
Can I replace the receptacle itself without the need for a whole new battery. (You can buy the wires with the plugs for about 100-150 bucks)

Do you think the dealership looked at anything past the interlock I had left off and that something more could be going on outside of the loose interlock connection.

 

They are saying this black piece is broken and requires a whole new battery, but it looks like an easy enough fix.