Upon further digging it looks like one can edit the KOReader's settings/network.lua. On my Kobo this file exists at KOBOeReader/.adds/koreader/settings/network.lua when accessed via USBMS.
For any curious readers check out the following files for more info:
- datastorage.lua
- frontend/ui/network/manager.lua
- frontend/ui/widget/networksetting.lua