Well there has got to be a way to change out the Co2 line, pull out the line and inspect the hole. If you do not see any eminent obstructions you could probably just bore the hole out little by little till you can fit both lines, you will have to seal it back up with foam though and it might not look good. Also I know with a refrigerator you can look under it to see where the coils are and drill where ever the coils aint.
I forgot you have to run two lines
