I have been looking in the forum for detailed installation guide how to install the Defa comfort kit and did not found so here is
my installation.

1. Finding the hole between the cabin and the motor: i found the hole for pushing the cabin heater cable on the left side of the car below the plastic cover near the windshield


2. Installing Defa battery charger: i installed the unit on top of the fuse box and cut a bit from the battery plastic housing in order to pass-through the cables to the cabin heater (see picture)







3. front inlet (see picture)





4. mounting the cabin heater: for this some of the car carpet needs to be cut (see picture)




So far i find the 1.5m power cable ridicules as it is too short (new one will be ordered)
cable for motor heater is too short (extension will be ordered)

Next is to install the motor cooling liquid heater, i will update later