Have you tested that those connectors with pre-attached wires are actually the right kind of connector?
The description says it's a JST-PH connector, whereas the Espruino connector is listed as a JST-PHR-2. Either the connector doesn't match, the Espruino reference or Adafruit website is wrong, or there are two part numbers for this kind of connector...
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Have you tested that those connectors with pre-attached wires are actually the right kind of connector?
The description says it's a JST-PH connector, whereas the Espruino connector is listed as a JST-PHR-2. Either the connector doesn't match, the Espruino reference or Adafruit website is wrong, or there are two part numbers for this kind of connector...