posibly a stupid question...

i have some speed controlers in my feather weight that run of 7.2v each i have 2 7.2 batterys that are way under powered for a feather but they seem fine for testing.
my question is this: how can i run both speed controlers of one battery? would some kind of adapter lead do it ??
the reason for this is so i can just have one removeable link.
thank you for reading this,
harry.

use a chock block and put both positive output together and both negetives (ground) output together.
And then have a battery in

You wire your batteries in parallel through a connector of some kind like so, put the removable link on one of the wires coming out of the connector and then put the speedos in paralel.