A kit with BOTH cables should not be the 1st "solution", because it seems that most purchasers of the P50 would need only one or the other (over and above the cable, if any, that might have come with the P50), given the current situation.
- If the P50 was purchased with one non M.2 drive, then that unit would only need EITHER the right or left cable for a 2nd non M.2 drive depending on where the configuration drive was located (presumably the right bay and so would need the left cable).
- If the P50 was purchased with an M.2 SSD and no non M.2 drive, then it would only need the cable for the right bay in order to add a non M.2 drive.
In order to need a kit with both cables, one would have had to purchase the P50 with only M.2 drive(s), then remove the drives(s) and install two non M.2 drives. I'd be willing to bet that this is extremely rare because it would presumably only happen if all M.2 drives failed and one had to use two non M.2 drives as a "fix"
The ultimate solution would be to design out special cables and trays entirely (but that doesn't help right now).
The best solution for the P50 going forward would be to supply 2 cables and 2 trays with the unit, even though some of them are not needed for the initial configuration. This would only cost a few dollars per unit. That solution would have already saved untold time for many people during this launch.
Even if the cables and trays were provided going forward, Lenovo would still need to create individual kits to both (a) satisfy existing jilted customers and (b) provide for customers for whom cables may fail in the future.
Further, if all cables and trays are not provided with the unit, the individual kits should also be selectable options during configuration. This at least lets the consumer know that they may be required to carry out their plans for the P50.