An electrical assembly combination comprises (a) a rigid assembly having a plurality of attachment element electrical contacts, (b) a flexible assembly having a plurality of flexible assembly electrical contacts, and (c) an intermediary device disposed between the rigid assembly and the flexible assembly. The intermediary device has connector electrical contacts including a first set exposed on a first base side and a second set exposed on a second base side. Each intermediary device electrical contact connects with an attachment element electrical contact or a flexible assembly electrical contact. Each attachment element electrical contacts is removably secured and electrically connected to the first set of intermediary device electrical contacts, and each of the flexible assembly electrical contacts is removably secured and electrically connected to the second set of intermediary device electrical contacts.