hello.....i am doing most of the work installing air handler/condenser, etc...then have a pro do the hookup and startup. my question is on the lineset...it has a 90 degree 6" end and a straight end. where would the 90 degree end go. my air handler is in the attic, so the lineset goes up the outside of the house. the 90 degree end would fit nicely in the hole in my wall then lay flat down to the condenser. otherwise isn't it difficult to bend this line 90 degrees?