All you need is one person, an ohm meter, and a set of labels
(Assuming even number of wires, odd numbers is a slight variation, see below)
Splice pairs of wires together at one end. Now go to the other end. Find a pair that is shorted together. Label one of them a #1, and ground it. Label the other as #2.
Now find another pair. Label one of them as #3, and tie it to #2. Label the other as #4.
Find another pair, and tie one of them to #4, labeling it #5, the other #6.
Repeat through the entire sets of pairs.
Once you get the one end labeled, go back to the other end. One pair of wires will be shorted to ground. Take them apart and find the one that is grounded. That's #1, the other is #2. #2 will be shorted to another pair of wires. Find that pair and take them apart. The one shorted to #2 will be #3, the other #4.
Continue until you label the other end. One round trip.
If you start out with an odd number of condcutors:
Ground one wire. Label it #1. Start tying the remaining pairs of wires together.
Go to other end and locate grounded wire. It?s #1. Find a pair of wires, and label one #2, tie it to #1. Label other #3.
Find another pair, label one #4 and tie to #3. Label other #5. Continue until you label them all.
Now go back to the other end. Find the one pair that?s shorted to #1, and take them apart. The one that is still shorted to #1 is #2, and the other is #3. Find the pair shorted to #3, and take them apart. The one still shorted to #3 is #4, the other is #5. Continue until you label them all.