ORIGINAL: Momin
Ok, is this what you mean?
Yes, that shows 2 stick packs in series giving a total voltage of 14.4v.
Would i be able to Convert the starter box wire to a tamiya connector, Plug in a Tamiya connector Y harness and use 2 batterys?
Yes, you can also buy just the connectors and solder them yourself
That is not like the picture you drew. It would only give you the same voltage, and twice the capacity. (parallel wiring)
It would have been better and cheaper to buy a gell cell that is designed for starter boxes
If I were you or your buddy I would also recommend dropping $12 on a 12.6v lead-acid battery.
This one has 4.5Ah, most likely much higher than the battery you plan on using.
http://www2.towerhobbies.com/cgi-bin...?&I=LXSK07&P=7
Ryan