Connecting system, hole carrier, method for the assembly of a module and use

A connecting system (1), comprising at least one hole carrier (2) with a row of a plurality of side openings (4) made therein in a longitudinal direction, the openings being aligned in a first orientation and in a second orientation orthogonal thereto and being made transverse to the longitudinal direction, wherein the side openings (4) of the first or the second orientation are shifted by one half a distance between center axes of two adjacent side openings (4), the connecting system (1) further comprising at least one round connection element (12) or at least one cruciform connection element (8), characterized in that a distance between two adjacent side openings (4) along the first orientation is less than a thru hole diameter created by a corresponding side opening (4) along the second orientation, a distance between two adjacent side openings along the second orientation is less than a thru hole diameter created by a corresponding side opening along the first orientation, and the thru holes of the first and the second orientation partially penetrate one another;

• and
• wherein the side openings (4) have a cross section in which a circular cross section is superimposed by a cruciform cross section in such a way that a contour of the circle is broken up at four places evenly distributed along a periphery.