 For these reasons, a flat-head screwdriver is often used as an impromptu pin splitter.For some time Union Connector produced 2P&G connectors with a distinctive yellow cover that featured a locking tab in the ground pin that provided a positive mechanical lock to prevent accidental disengagement of the connectors.This design required special connectors on both the male and female side in order to work, meaning that all connectors in an installation would need to be replaced to see a real benefit to the locking feature.