Summary

Now you can have a nice dock to charge your pebble and keep the original cable for travel.

Instructions

Consists of 3 printed pieces, one cannibalized usb cable and two paperclips.
Requires some work after printing.
The paperclips are used as the pins. (bottom one is 5V and upper one is ground.)
The tips of the paperclips that stick out are spring loaded and function exactly as the pins on the original charging cable. this is achieved by fixing the bottom part of the clips and leaving room for the tip to move forward and backwards. this can be seen i the pictures.
Finally all parts are glued together, using abs melted in acetone. Be carefull not to smudge glue near the moving sections of the paperclips. It may cause the pins to get stuck.
Feel free to ask any questions, if there are any unclearities.

Pebble Smartwatch charging dock without the original charging cable