The previous diagram seemed to related to the Photon ... see:
when we look at the data sheet for the Electron we don't seem to see the same / similar description of the buttons. However, it wouldn't be a stretch to assume that the schematics would be close/identical. If we look at the schematic found in the electron we see the following:
This seems to show that there are two pins of interest to us called SETUP (38, PC7) and RST (7, NRST). However, when I say "pins", I mean pins exposed by the integrated circuit and not pins exposed by the module. My guess is that RST is exposed as a module pin but SETUP is not. What that would mean is that short of mechanically attaching new wires to your Electron module, there would be no way to use the existing GPIO pins to cause a "setup" button to be electrically triggered.