Percy right
is a kind of "use case" by "use case" view, which is a logical view, there is still brain work needed to map it to the physical view specially with all the mods to be done..
And looking at the starter interlook subsystem page it apears that your 3 cable do as Joules was stating go there..GY, LB, BK
The big map is more an overview but to my judgement not relly to work with, again I had all out and on the desk..