An electronic subassembly for a personal care product with a housing defining a chamber. The housing has a tapered guide surface. A first circuit board having a rigid end is positioned within the chamber and a flexible portion positioned outside the chamber. A second circuit board is positioned within the chamber of the housing. The second circuit board has an electrical connector dimensioned to receive the rigid end. An adapter is secured to the first circuit board between the rigid end and the flexible portion. The adapter has a corresponding tapered guide surface that engages the tapered guide surface of the housing to align the rigid end with the electrical connector.
