Discrete electronic modules, such as display tiles, designed and configured to be mosaicked and operatively connected with one another and/or to one or more differing types of discrete electronic modules. In some embodiments, the electronic modules are electrically connected together using electrical connector units that are separate and distinct from the electronic modules. In some embodiments, the connector units are connector biscuits. In some embodiments, the connector units are hub connectors. Connector units of the present disclosure can be designed and configured to allow an electronic module connected thereby and part of a panel of display tiles to be installed and removed by moving the module only in a direction normal to a viewing face of the panel at that module.