1Use a Nixie tube as a guide for installing the pins
Place the Nixie tube pins onto the Nixie tube itself, this will allow them to be soldered into the circuit board much more easily. Don't slide the pins fully onto the Nixie tube, make sure they're just on enough to be held in place. If you slide them on completely, you might accidentally solder the pins to the Nixie tube itself.
2Solder the Nixie pins in place
Insert the Nixie tube with the pins into the circuit board. Solder the pins in place.
3Snip excess pin length
After the pins have been soldered in place, snip away excess pin length from the back side of the board.
4Solder in the resistor jumper
Using two 0.1" header pins, solder the jumper pins into place above the position for the 15k resistor.
5Prepare the breadboard header pins
Using the 13 remaining header pins, snip the second-to-last pin on one end without actually cutting the strip. It should look like this when you're done:
6Solder in the breadboard pins
Now, solder the breadboard pins into position on the back side of the board.
7Add the resistor
Finally, solder the 15k Ohm resistor into place.