A connector unit for connecting two or more structures (16, 20) wherein at least one of the two or more structures (16, 20) being connected is a mobile structure validated for pharmaceutical manufacturing or patient care, the connector unit comprising: a wall of a cleanroom structure, wherein the cleanroom structure is the mobile structure validated for pharmaceutical manufacturing or patient care; a wall of a corridor structure, wherein the corridor structure is one of the two or more structures (16, 20); an alignment system of the type cast and mold system with a protruding cast and a complementary mold, whereby the alignment system moves the wall of the cleanroom structure and the wall of the corridor structure into contact with each other, the alignment system comprising a cleanroom alignment structure that is formed on the wall of the cleanroom structure and a corridor alignment structure that is formed on the wall of the corridor structure, wherein a shape of the corridor alignment structure is complementary to and fits a shape of the cleanroom alignment structure or wherein a shape of the cleanroom alignment structure is complementary to and fits a shape of the corridor alignment structure, wherein the cleanroom alignment structure and the corridor alignment structure are configured to align an opening in the wall of the cleanroom structure and an opening in the wall of the corridor structure in the same movement that moves the two walls (40, 42) together; a seal or sealing system (60, 62, 64, 66, 68) positioned on the wall of the cleanroom structure or on the wall of the corridor structure or both that seals the aligned openings between the cleanroom structure and the corridor structure from an environment with an air tight seal or an air tight sealing system; and a fixation system, positioned on the wall of the cleanroom structure and on the wall of the corridor structure, that affixes the cleanroom structure and the corridor structure together in contact with each other to prevent unintentional movement of the two structures (16, 20), or breakage of the seal or sealing system, wherein the unit can be used to connect one, two, or more previously validated pharmaceutical manufacturing or patient care units. a wall of a cleanroom structure, wherein the cleanroom structure is the mobile structure validated for pharmaceutical manufacturing or patient care; a wall of a corridor structure, wherein the corridor structure is one of the two or more structures (16, 20); an alignment system of the type cast and mold system with a protruding cast and a complementary mold, whereby the alignment system moves the wall of the cleanroom structure and the wall of the corridor structure into contact with each other, the alignment system comprising a cleanroom alignment structure that is formed on the wall of the cleanroom structure and a corridor alignment structure that is formed on the wall of the corridor structure, wherein a shape of the corridor alignment structure is complementary to and fits a shape of the cleanroom alignment structure or wherein a shape of the cleanroom alignment structure is complementary to and fits a shape of the corridor alignment structure, wherein the cleanroom alignment structure and the corridor alignment structure are configured to align an opening in the wall of the cleanroom structure and an opening in the wall of the corridor structure in the same movement that moves the two walls (40, 42) together; a seal or sealing system (60, 62, 64, 66, 68) positioned on the wall of the cleanroom structure or on the wall of the corridor structure or both that seals the aligned openings between the cleanroom structure and the corridor structure from an environment with an air tight seal or an air tight sealing system; and a fixation system, positioned on the wall of the cleanroom structure and on the wall of the corridor structure, that affixes the cleanroom structure and the corridor structure together in contact with each other to prevent unintentional movement of the two structures (16, 20), or breakage of the seal or sealing system, wherein the unit can be used to connect one, two, or more previously validated pharmaceutical manufacturing or patient care units.