Nope, you're not going to be able to do it with those batteries.

First the motor calls for 4S or 5S.

You COULD wire the batteries in series to get the equivalent of a 6S out of the pair, but you'll overdraw the batteries or at very best get very short run times out of them.

Let's do a bit of math.

The motor is rated at 760KV and calls for a 5s lipo using an 11x6 prop.

Ok, so assume 35Amps draw, given that they are calling for a 40A controller...

35A x 18.5v = 647.5 watts or under 1HP of power, which is about right for a .40 - .46 trainer plane.

Your batteries hooked up as 6S would produce...

647.5 / 22v = 29 amps which is just about 20C continuous!

You never want to run the batteries at a maximum capacity, and those are 8C batteries.

You'd burn them up in short order.

If you instead went 3S2P you would get 3000mAh 16C max capacity but now you are down to 11v.

So...

35A x 11v = 400watts.

So now your plane will be underpowered.