For future reference, there is a mod you can do to make an adjustable belt tensioner with a few xD parts and a hacksaw so no pry bar needed to tighten this belt. It uses a bolt on the bracket to adjust belt tension then you lock down the alternator bolt.
Modified my Gen1 xB’s serpentine belt tensioner by combining it with a 2013 Scion xD tensioner. This mod can be made without removing the xB's, as no alteration is needed to it. I took it off for taking pictures. The xD's is comprised of three Scion parts and one additional bolt. 16385-37010 -...