Slant 6 power steering belt replacement

I have a 70 Dodge Dart Swinger with 225 Slant 6. Fairly new owner and doing some repairs. Changing all 3 belts (has a/c and power steering). I got 2 belts off but cant find where to adjust tension for power steering belt.
Please include picture if you can.

Also any recommendations on what belts I should buy to replace all 3.
Thanks