Connecting terminal, - having a contact cage, which has a cage bottom, a cage top, and two cage side walls facing each other, which connect the cage floor and the cage top on each side, which together form a lateral surface and enclose a conductor receiving chamber. - having a clamping point formed of at least one spring element and a counter bearing, said clamping point serving for the holding and electrical contacting of an electrical conductor, - having a front-end conductor insertion opening, which is enclosed by the cage walls, the cage top and the cage bottom, and through which the electrical conductor can be inserted into the conductor receiving chamber and supplied to the clamping point. - having a longitudinal axis of the contact cage oriented in the conductor insertion direction, - having an in particular cylindrical natural cross section outline of the contact cage, which extends substantially from the front side of the contact cage to one of the ends of the contact cage opposite the front side, wherein - the lateral surface of the contact cage is retracted into a region of the conductor insertion opening that is subordinate in the insertion direction, and restricts the lead receiving chamber, the clamping point of the contact cage is subordinate to the retracted lateral surface in the conductor insertion direction (x), - the cage bottom forms a tongue, which extends from the conductor insertion opening in the direction of the end of the contact cage and forms an inclined guiding surface (17, 22, 25), - due to the retracted outer surface, an inclined guiding surface (17, 22, 25) arranged within the natural cross section outline is formed in the region of the conductor insertion opening, which moves a conductor that is to be inserted into the connecting terminal in the direction of the longitudinal axis of the contact cage, wherein the inclined guiding surface is formed from a cage side wall, - the contact cage has an engagement hole for an opening tool, which allows access to the spring element, characterised in that, - both cage side walls form a inclined guiding surface (17, 22, 25), - the inclined guiding surfaces (17, 22, 25), together with the cage top, form an insertion funnel that is subordinate to the insertion opening in the plug-in direction, - the lateral surface of the contact cage is retracted in the region that is subordinate in the insertion direction by an inward offset of the cage side walls on both sides in the direction of the longitudinal axis of the cage, - the retracted region of the lateral surface of the contact cage extends to the region of the engagement openings and restricts the conductor receiving chamber, and in that the cage top has a respective engagement hole for an opening tool in the transition region to the respective side wall, which allow access to the spring element. - having a contact cage, which has a cage bottom, a cage top, and two cage side walls facing each other, which connect the cage floor and the cage top on each side, which together form a lateral surface and enclose a conductor receiving chamber. - having a clamping point formed of at least one spring element and a counter bearing, said clamping point serving for the holding and electrical contacting of an electrical conductor, - having a front-end conductor insertion opening, which is enclosed by the cage walls, the cage top and the cage bottom, and through which the electrical conductor can be inserted into the conductor receiving chamber and supplied to the clamping point. - having a longitudinal axis of the contact cage oriented in the conductor insertion direction, - having an in particular cylindrical natural cross section outline of the contact cage, which extends substantially from the front side of the contact cage to one of the ends of the contact cage opposite the front side, wherein - the lateral surface of the contact cage is retracted into a region of the conductor insertion opening that is subordinate in the insertion direction, and restricts the lead receiving chamber, the clamping point of the contact cage is subordinate to the retracted lateral surface in the conductor insertion direction (x), - the cage bottom forms a tongue, which extends from the conductor insertion opening in the direction of the end of the contact cage and forms an inclined guiding surface (17, 22, 25), - due to the retracted outer surface, an inclined guiding surface (17, 22, 25) arranged within the natural cross section outline is formed in the region of the conductor insertion opening, which moves a conductor that is to be inserted into the connecting terminal in the direction of the longitudinal axis of the contact cage, wherein the inclined guiding surface is formed from a cage side wall, - the contact cage has an engagement hole for an opening tool, which allows access to the spring element, characterised in that, - both cage side walls form a inclined guiding surface (17, 22, 25), - the inclined guiding surfaces (17, 22, 25), together with the cage top, form an insertion funnel that is subordinate to the insertion opening in the plug-in direction, - the lateral surface of the contact cage is retracted in the region that is subordinate in the insertion direction by an inward offset of the cage side walls on both sides in the direction of the longitudinal axis of the cage, - the retracted region of the lateral surface of the contact cage extends to the region of the engagement openings and restricts the conductor receiving chamber,