Problem with my new NEU lipos

[mistercrash]

I checked with a multimeter and the voltage is fine at positive 14.86 volts for both packs. I also checked the positive and negative terminals of the balance tabs of the packs and they also shows a positive voltage. So it's probably the balance tabs I use to plug to the charger. I included a pic of the two packs plugged to my charger, I tried to make it as clear as possible.
So if I need new tabs, which one do I get? I searched a bit and I'm a little lost with all the tabs available. Not sure which one to get. Anyone can provide a link please?

Thanks