A system and method by which specialized components (tenants) are mounted to an assembly comprising a plurality of modular units. Each modular unit has one or more interface connecting locations for one or more of a power connection, a thermal connection and data base connection, along with one or more of power, thermal and data transmission paths. Modular units can be united in an assembly, and at least some of the modular units have a switching system to selectively transmit and/or receive one or more of power, thermal and data transmissions.