Logic jumpers are located in the top right corner of the panel. 4 rows of 2 prongs each, numbered 1-8 from bottom right to top left. like this...
8 - - 7
6 - - 5
4 - - 3
2 - - 1
When the jumper is "on" it connects 1 to 2, 3 to 4, etc.
The logic seems consistent on the years available on the website as follows....
1-2 ON for 40amp, OFF for 50amp
3-4 ON for 2 pump, OFF for 1 pump
5-6 ON for 60amp, OFF for 40 or 50amp
7-8 ON for degrees in C, OFF for F
So your 60 amp should be 1-2 OFF and 5-6 ON.
How old is it?