Shock Towers
If memory serves, the compressor hit the tower long before it was in position, so you'd have to cut out a large scallop to allow room for the hoses as well. The hoses mount on the rear of the compressor, so you not only have to cut out to clear those, but you must leave enough room to be able to remove them for service.
I'd recommend against cutting into your towers. These are structural members that don't need to be weakened. It was easy to make the brackets to move the compressor. One thing I did not mention is that I replaced the stock compressor with a Sanden that has the ports coming out of the top instead of the back. I made up new hoses and routed them appropriately.
Many factors go into this decision. My way cost more than merely modifying the tower, but for me, the cost was justified. If you are on a shoe string budget, cutting the relief, flipping it, and welding it back in is a quick fix. And you won't have to fight serpentine belt alignment issues. I ended up having to slot my brackets some so I could get my belt to stop squeaking.