Okey.. Seems like I've overdone it by connecting directly to the battery then, right?
Edit: learned from the seller of the thunderbox that I should always connect a trickle charger directly to battery.
Since I already pulled wires to the battery for the pdm which from what I understand has been unnecesary, I'm now thinking I can two still use the connector in the rear. And use the wires I already pulled for the trickle charger. But I might be totally wrong here..
Thanks for the reply!