In scripts/updateEntitys.lua, check_planet asks every planet other than the five vanilla ones for 100 relays (gethowmuchneedretrans), and the GUI shows the planet as done once they are up. But change_output turns production on only for nauvis, vulcanus, gleba, fulgora and aquilo (the if surfname == ... chain around line 594), so on Paracelsin, Rubia, Muluna, Hyarion, Vesta and the other modded planets the connectors never produce. Platforms work, they skip the check.

A fix is to use the same rule as the GUI:

if havenow == nil then
  done = false
else
  done = havenow >= gethowmuchneedretrans(surfname)
end

Also, the connectors use usage_priority = "tertiary", the priority of accumulators, so the network takes their power only after every other generator. primary-output lets the free power of the sphere go first (reported in the thread of the original mod).