USB-C Connector wiring 3 wires
I have the same issue, I can tell you what I've learned.
The 3 wires are Vbus, GND, and CC1.  From the picture it looks like the blue wire is CC1.  Can't tell what the other wires are, going to need to test them.  They should default to 5v, which should allow you to test polarity.
USB Power Delivery (PD) is a single-wire protocol which communicates over CC1.
What I'm going to do to repair my charger is use a USB 2  type C male connector. The one that has V D+ D- G solder pads, plus 5.1k resistors. My plan is to remove the resistors, which is pull-down between CC and GND.  Exposing CC1.
When I finish doing this and it works. I will update with pictures showing connection of USB C connector.