I accidentally broke the back off my knock sensor box when taking out my engine harness by pulling on it too much and not unclipping it >.< , the board is kinda loose inside now, i need to find the back of it .. can i fix it ? i figured i can

I know it seems like a dumb question and all, i just feel stupid for having broken it trying to pull out the engine harness through the firewall * doh *

 

I assume its fine, but is there any way to know if i messed it up