I currently have a single 12v cigarette style socket running off of the leisure batterys in my van. Even with adapters Its not enough and I need another preferably in a more descreet location for charging phones etc. I checked the wiring , and the thickest cable in the right area seems to be the existing feed to the original 12v socket. The only other wires in that area are feeds to the halogen(now led) kitchen lights. Is it ok to take the feed from the same cable and then run it to both the original and new socket? The new one has a 10amp fuse in line. Thanks for any help.