cant fig. out how this works

ok i about to build a brushless emaxx. but i cant figure out how to use the dual batterys with the speed controller i want to use.

i was goign to use a mamba max 5400kv with 2 3cell 4000mah lipos

but the speedcontorler one has one battery plug coming off of it.

now do i splite it into two plugs or how do i do it?

thanks

the reason for using the mamba max was cause i can get it for so cheap cause i work at hobbypeople.

also do you think the mamba max will give the car that much power? or should i up it to something else