According to the invention, a metal insertion piece (6) is provided in a solderable electrical connection element (1) with a thin support sheet (2), at least one metal conductor (3) and at least one free contact face (5), which may be joined to an associated connection face (11) of another component (12), by means of a soldered joint that can be made using a solder deposit (9), which metal insertion piece (6) passes through the connection element (1) and the support sheet (2) respectively in the region of the contact face (5) and is securely joined to this support sheet, which serves as a base for the solder deposit (9). Preferably, the insertion pieces (6) may be derived from conventional crimp attachments. They may also be used for mechanically fastening both the solder deposit (9) and an electrical conductor to the support sheet (2).