2013-pathfinder-voltage-sensors-on-battery

[dangeris]

Hi Guys...Helping a friend install a relay harness in the engine bay. The harness has a positive spade that attaches ot the positive terminal of the battery. He told me that the dealer said there were voltage sensors on the battery. Do you know what this guy is talking about. I haven't personally seen his engine bay but I never had any issues installing a relay harness in any vehicle. Can some one verify this or take pics and point out what he's referring to? Thanks in advanced guys