So, the set consists of 4 components: a vacuum module that attaches to the underside of the rear shelf in the trunk, a ceiling sensor, a switch in the console between the seats, and a harness (I didn't have it, I made my own)

Firstly, inspecting the device, disassembly, cleaning, lubricating the motor. Replacing worn out paralon

Preparing the installation platform:
1. Remove the rear seat completely, remove speakers from the shelf (next you need to prepare holes for air passage in the shelf on the body and cut similar holes in the plywood shelf, but I had additional speakers installed there and did not cut anything) and the shelf itself.
2. Remove the armrest. It is held by 5 self-tapping screws, two at each side of the gear lever, and three inside the armrest.
3. Remove the cover under the passenger's left foot (two screws in recesses behind the pile)
4. Remove the front left sill cover
5. Remove the ceiling light from the roof.
I made my own harness, it took some time to figure out how the gadget works and draw a schematic

Next, you need to find connection points for all components.

Terminal E for connecting the harness under the passenger's left foot
terminal C for connecting the switch under the armrest (it may be hidden behind the module)
Harness terminal D. Under the passenger seat
Sensor terminal F should be here. But something went wrong…

There is no connector… Feeling around the wire behind the ceiling trim panel did not yield results, I had to tear off the trim near where the light was attached~another failure. Went in from another side, removed the center pillar cover,

I saw that five wires enter into the harness from the pillar and only two come out of the light fixture~I pulled out the harness and found the remaining three wires with connectors at the ends inside a tube~cable sheath.

Why was there no plastic connector? It remains a mystery to me. Well, I have the connector anyway.

Make an incision in the ceiling trim near the light fixture, insert the connector into it, find holes for mounting the sensor and secure it with screws (but not long ones, or you'll drill through the roof)

Secure the vacuum module, connect its remaining terminal A to the harness, turn on the ignition and check if everything works properly. If all is well, attach a mesh cover onto the rear shelf (I don't have mine yet), and reassemble everything in reverse order.

Good luck to everyone!