This photo illustrates the path of the belt; you can see where it passes the alternator (red arrow), power steering pump (green arrow) and A/C compressor. Use this illustration when installing the new belt.
Here is a photo of the tensioner out of the vehicle. You can see the 17mm spud for rotating the tensioner (red arrow) along with the locking pin (yellow arrow). You need to install the tensioner in the locked position. Remove the pin after you have installed the new belt. Installation is the reverse of removal. Take care to make sure the belt is properly seated on all the pulleys and follows the right path as shown in picture 1.