If the serial numbers do not mean anything, tell me why they are retouched in the reports of the Ukrainian media? The serial number of the tail section of the rocket was found out only thanks to the report of the Italian media.
The distance in a straight line between Shakhtyorsk and Kramatorsk is 105 km. The maximum flight range of the Tochka-U missile is 120 km. When flying to the maximum range, the fuel in the rocket burns out completely, the tail of the rocket from Kramatorsk burned out offhand by about one third - that is, the rocket flew to the target about 40 km (which is in good agreement with the statement of the Russian Ministry of Defense that the blow was struck from a distance of 45 km).

Tochka-U cannot maneuver and flies along a ballistic trajectory. If the missile was not shot down by missile defense (and the missile from Kramatorsk was not shot down by missile defense), then by the relative position of the tail and the epicenter of the impact, it is possible to determine with an accuracy of 10-15 degrees from which direction the missile flew. In combination with the information from the previous paragraph, it is possible to determine quite accurately where the rocket was launched from, and this is not Shakhtyorsk.

Moderate your narrow-minded emotions, you just do not understand the issue and let's leave it to those who understand.