It is a kind of connect box method include liquid composition have microfluidic delivery system offer. The method comprising the steps of:: a shell is provided, shell includes electric contact, and electric contact, wherein shell is arranged in the first plane A kind of print cartridge is provided comprising a container is in electrical communication to contain fluid, mold, including a nozzle, multiple electric contacts, with mold, the electrical contact housings be arranged in the second plane for be parallel to the first plane along It is parallel to pass through the mobile direction of box in box and shell, with the second plane towards shell until electrical contact housings are in electrical communication, the shell with electrical contact.
