We haven’t visited this problem for awhile, so I’ll reinforce it now before anyone gets the idea that Amps are the key to anything.
In a three-phase setup, there are 48 possible permutations of phase assignment and CT orientation for the three mains. Only one of them will yield correct power (Watts) measurement. All of them will yield correct current (Amps) measurements. Virtually all billing is based on Watts, so virtually everyone is interested in Watts and Watt-Hours.
Amps is RMS and so has no sign, so it is not useful in determining correct CT orientation. It also is not dependent on phase so cannot determine correct phase assignment.
The installation procedure in the docs is a straightforward and relatively simple way to get it right.