Hello! Well as the title states I had to replace the rear loaded 9v battery box(Gotoh-no logo) on my Stingray bass. I was going to solder the new cables to the existing ones but for whatever reason I used two Wago solderless connectors. They seem to work just fine but would like to know what would be the proper way to measure using a DMM that the voltage isn’t being hampered/dropped in any way that would negatively affect it. Thanks in advance for your input! Peace!!