Turn signal switch wiring

Harness connectors are for ease of assembly and service but.... as stated above, It was several years later before Chryslers engineers changed this particular harness connector to a more serviceable design, size and shape. If you did buy the harness side connector chopped of a OEM harness, you would need to make up the wires to your harness in a similar way to what the previous owner did, or buy the proper Packard female terminals for it.
In my opinion... this few dollars spent is still the most practical solution... https://www.amazon.com/dp/B07DLQGMD5/?tag=fabo03-20
It wont be any more serviceable in the future, should your signal switch fail again. You will be able to unplug the signal switch if you ever need to remove the column for some other service procedure.