With any of these connectors you have to take out the positive pin to get the rubber out so it doesnt melt correct? I bought an extender ( the kind that is a male 510 on one side and and ego male and female 510 on the other) at my local B&M and I am trying to use it for my Mech mod. Haveing a really hard time figureing out how to connect it to a copper end cap without melting the inside and i dont know if they are able to be seperated. And ideas would help. I was reading the other thread on 510 connections but didnt want to hijack it...