Here's a pic of a wiring pattern that should fit your components.
This is from Cadfael's book on bass wiring. The kit is a near copy (I think) of the Fender 2017 Mustang. This shows how these Mustangs were originally wired. Almost all of this is in English.*
This diagram shows the original values. As Weirdbits has guessed, the pots are 250K. This diagram also shows the switch that goes in the lower horn.
* The parts in German are pretty simple... "Masse" is "ground" or "earth." "Spitze" is "tip." "Schaltplan" is "wiring diagram." "Saitenerdung" is "string grounding", "Kabel zum Steg" is "wire to the bridge".
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