I used the female headers on the wemos D1 mini in case I decide to use the wemos on another project down the road. The build is pretty straight forward.

I soldered wires to the anode and cathode of the LED. 

I soldered a 220 ohm resistor to the end of the wire connected to the anode. I plugged the resister into D8 and the cathode into ground. I then pushed the LED into the hole provided in the case, inserted the 3D printed button into the receptacle, placed the Wemos into position, then slid the lid closed over the whole thing.