When doing trauma resolution with HMR or DSMR, when the healing signal from reframing is sent through the body and to the akashic records, is that done via the relevant cordings for the memories being worked on?

This is the case, and the reason is, that the intention is for a specific healing and therefore will be directed by the mind to the cording giving rise to the need for healing in the first place. It is the part of the client that is throbbing, so to speak, in reaction to a dilemma of some kind. So it is appropriate for the healing to go right back to that cry for help that got things started energetically, to motivate the client to work on a problem or issue for which they have some awareness at least, if only in a general way, as with feeling anxious or stuck or depressed, for example. When that leads them to specific memories, those specific cordings will need the healing signal to pass through them so that they can go directly to the energetic signature of their origin in the akashic records to make changes for the better.