Translation from the words of the author:

Here is the full Warzee package with all parts in .zip
In the fashion there are several xml that come from the kit, it is always 1 machine of 2 parts
This means that the underlying XML must have access to 2 different XML files.

Pack consists of the following components:
5 devices = Warzee Shredder de250, Warzee Shredder de551, Spike 1, Spike 2, Spike3 = 5 separate XML files

Join us:
3 sets xml = Skidsteer de250_skidSteer, front loader de551_frontloader, telescopic handler de551_frontloader
And since each of these 3 sets has 2 devices when purchased (1x Predder 1x Pike each)
A bunch of XML should tell the game.
"I am sharing a mod from 2 and I need to install deshlab 2 xml"
The file de250.xml and the file spike1 xml together create the file de250_skidSteer.xml
The file de551.xml and spike3 together create the file de551_frontloader.xml
The file de551.xml and spike2 together create the file de551_telehandler.xml
the result is 8 xml, 3 of which are tied, but only in Moddesc