Abstract: A connector head (10) and a process of joining a connector head to the case (12) of an active implantable medical device, such as a pacemaker, defibrillator, cardiovertor and/or a multisite device. The process includes the steps of a) mechanically and electrically assembling the connector head onto the case; b) injecting of a quantity of a photo-hardening adhesive, in particular a photo-reticulable silicone resin, into an interface formed between the assembled case and the connector head; c) irradiating the quantity of adhesive by a light having a wavelength that is adapted to harden the adhesive; d) optionally affixing a mask on a portion of the case; e) immersing the case provided with its connector head into a photo-hardening resin, so as to form on the case and the connector head a layer of photo-hardening resin coating; and f) irradiating this layer of resin by a light having a wavelength adapted to harden the resin.