battery upgrade

[jones]

Hi I have an Avanti Montari E 36 v 10.4 ah, I would like to upgrade to 36 v 16 ah ( approx) the problem is that my battery has 6 terminal on the battery frame mount, the two outside terminals are + and - the 4 inside these have wires to control something. I can find a supplier through Alixpress that have that type closest I can find have 5 terminals, Is there a way around this problem as I am a Tech Deadhead.
Any advise or an Aliexpress company that have a battery I can use Please let me know.
Thanks all Jones