Disconnect 1 known cable, tie string to it and pull to rear.
I normally make a loop with cable and use electrical tape to tape plug to wire so it doesn’t get hung up as bad.
I like the tarred trot line string because it doesn’t fray, but any similar sized string should work.
I’d pull a few lines through for next time and in case you break a line.
Then next time you pull a cable, pull another length of line with it so it’s already there.