Method of connecting at least two structural parts

A method, comprising:

• forming two walls of a first structural part which are spaced from one another in p first direction and extend in a second joining direction which is transverse to the first direction such as to at least partly encircle a region of the first structural part, with each of the walls having an aperture;
• attaching form elements to a main body of a second structural part, so that the main body extends in the first direction and has two opposite ends spaced from each other in the first direction, and the form elements are located at the opposite ends correspondingly and movable in relation to each other and to the main body between a folded-out and a folded-in position;
• forming each of the form elements with a V-shaped bend having an apex, a first inclined portion extending from one of the opposite ends of the main body of the second structural part laterally outwardly and upwardly to the apex, and a second inclined portion extending from the apex laterally inwardly and upwardly;
• placing the second structural part in the region of the first structural part such that the form elements touch the walls of the first structural part;
• and
• pushing the second structural part in the second joining direction into the region, thereby causing the form elements to move in relation to the main body of the second structural part to assume a folded-in position until reaching apertures in the walls of the first structural part so that upon reaching the apertures the form elements assume a folded-out position and move into the apertures and to be arranged therein to thereby position the second structural part in the region of the first structural part.