That will be happening at some point. How it gets tied in is the question. Hector needs a new trucking operation. As far as he's concerned, the cover is completely blown on "Regalo Helado." Of course, Nacho could offer Hector his assurances that the hit was isolated, not likely to re-occur. But how could Nacho offer such assurance to Hector without bringing suspicion to himself?
In Breaking Bad, it is Hector that brings Gus Fring into the cartel for his "chicken cover" while putting a bullet in the head of Gus' partner, a partner who possessed a high science acumen - Walter-esque - or so the viewer was made to believe. This occurred as a BB back story, before the time of Walter White, leaving this unanswered question: how was the cartel in a position to need only Gus Fring's trucks, yet not be interested in the lucrative opportunities that could have come through Gus' partner?
That question has only been recently answered in these episodes of Saul, as the viewer sees the earlier formation of Hector's business with the cartel already includes meth-type fun.
Gus' partner took a bullet in the head because the cartel saw a threat to their business - refused to explore the possibility of a superior product. In intentional opposition to that error of arrogance, Gus Fring began his revenge against the cartel when he met Walter White.