That pic helps a bit. A lot of radios have a similar dial cord arrangement, certainly other Admirals of that era.
Usually you start with tuning cap closed, pointer at the low end of the dial.
Make sure the wrap around the tuning knob shaft is in the right direction, 2 1/2 turns is average. No disgrace in using a bit of tape to hold cord on the pulleys.
String it up a bit loose, make sure it will work, then shorten up to put tension on the spring.
Your model is mentioned:
https://www.radiomuseum.org/r/admiral_380_7h.html