A/C compressor belt rerouting

You won't be able to use the one currently on it, however it shouldn't be difficult to find a shorter belt and simply route it down to the crank pulley following the green lines. You can use the 6PK1694 belt. To install it you will want to release the belt tensioner, remove the current belt from the alternator and let the tensioner extend, then loosen the two bolts that hold the tensioner in place to get enough room to slip the old belt out and the new one in. Tighten them back down and install the new belt.