Tamiya Mini soldering thicker wire to motor

[Boons]

Hi all,

At the club we're allowed to solder directly to the (kit only permitted) motor as the the current wires are thin and one is connected with a spade.

The kit ESC runs 16awg wire and I will be using 4mm bullets to connect the esc to the motor.

My question is should I stick with 16awg silicone wire to match the esc or can I go thicker? Would a change in gauge past the bullet connectors cause an imbalance in the current?

Sorry for the numpty question!

Cheers!