You can also use a 510 to 510 adapter to get the EMDCCs to work with your Provari (or really anything that doesn't have the eGo skirt/threading). The EMDCCs have a normal 510 connection, you just need the adapter/extender to reach it under the ego skirt. The only atomizers/cartomizers that really need the 510 to eGo adapter are ones that have threading on the inside of the skirt itself.
I mention this because 510 to eGo adapters seem to have...significant manufacturing quality issues. I've purchased them from multiple vendors, and fully half of them either have bad threads on one side or the other, or just plain don't make an electrical connection with some devices/cartomizers/atomizers.
I've had much better success with the 510 to 510 adapters (ie, all of them have worked on all of my devices). Plus, they look cleaner if you use them with an atomizer and dripshield, too!