I was fitting an earthing kit to my 99 classic and to make the connection to the ECU I took the wire through a grommet that has a very soft rubber hose going through. This is above and to the right of the ECU. I am just wondering if I am upsetting something by squashing this hose with a cable?

 

It's the air-con condensation outlet.. you should be ok, but check that no water drips on the inside of the car when you're using the 'air'