Case 2. KV is in garage at the moment of the split (update release):

KV tier 5 is substituted with KV-1 as tier 5 heavy tank;
Ammunition moves from KV to the depot;
Consumables mounted onto the KV go to KV-1;
Equipment mounted onto KV is demounted and goes to the depot without any expenses or losses;
If in the KV tree the turret “KV-2” is researched, players get the tier 6 heavy tank KV-2 to their garage without any additional modules and consumables, also one free slot for the tank is added to the garage;
Players get a new full crew for the KV-2 with 100% training;
Camouflage mounted onto KV is moved to KV-1 and to KV-2. The expiration date of the camo on both vehicles (KV-1 and KV-2) stays the same as it was for the KV at the moment when the split took place.
Modules mounted onto KV which do not fit other tanks (suspensions, turrets) are sold at the original purchase price; credits go to player’s account.
Modules from KV that fit other tanks go to the depot.
Players get one free slot for a tank added to their garage.

您可以參考這段說明。
重點在 KV-2 turret。