Whirlpool ED22PEXHW00

So I inherited this trouble. Everything looks fine from wall into water connection in back of refrigerator. From there the line is routed to the front, near kick plate, where it looks like it was cut/bitten/damaged. So water leaks from there and never makes it to the ice maker. I was curious where the other end would be (how is this tube routed? - is it routed in freezer door?) and if it is patchable if there is enough slack, otherwise is it fixable by replacing entire line, and how is it routed end to end, what would be required to be taken apart. Any input would be appreciated. Thanks in advance.