If you drive your Huracan for at least (consecutive) 20-30 miles at least once a week, you don't really need the trickle charger.
If you keep the car "stored" for longer than three weeks, I would use the trickle charger.
It is my understanding that you just plug it in into the socket plug in the storage compartment in the front but be careful regarding the plugging it in order...you have to plug it in into the wall outlet first and then into the car's socket plug. To make sure this is correct, check with your manual!!!