Based on reports on the internet and actual testing I have done, the F3000 ports (as well as the F3800 ports, although a different "plug") are simply 2 positive and 2 negative pins and a bunch of data wires that can be ignored. Therefore it would actually be eaiser to create an adapter from the F3000 to your batteries as there are no needed resisters. Please consider creating one for the F3000. I would love to add a couple of your batteries to my system.
Thank you