They could have eaten anywhere, that's going to be a tough one for you! Hope you have a good multimeter.
Need to go 'back to basics' and start checking fuel pump etc etc etc..

 

I know when my hood wouldn’t open I used a metal coat hanger. I have a stainless grille though not sure if this technique would be a good idea if you have the plastic grille.

 

Today I found the chewed wire on top engine going to Throttle body

and soldered in new wire and female connector into the plug... and it started !! I now have more rat baits zip tied in. The rats got to my Tesla last month which was a tesla fix $800 for new wiring harness headlight and wipers.
Next is to change front top radiator hose with bite marks through to the inner layer....