Bullet connectors on the motor side is all good, so you dont have to do much about them, other than solder their female counterparts to the ESC.
On the battery side, you might want to pick a connector to be your general purpose connector, or universal connector if you like.
If you got one type of your connector on all your models and batteries, swapping in between, and charging them, becomes a much simpler business. mine standard connector is the dreaded deans. If i were to pick one today, XT60 would been a good candidate. So if you havent picked any universal connector already, Just sticking with the XT60 that the battery comes with is fine.
But its delivered without a male XT60 plug, so you need to order one. As the name implies, XT60 is good up to 60A continous draw. So if you plan on any later models with higher amp draw, you might just aswell choose a more powerful plug right away.

Edit: By the way, do you have a wattmeter already? If not, place that on the order aswell. Its not very expensive, but it helps you a lot when trying to find a descent prop size. You definetly want to get a reading on watts and amps on first run. In case the prop is too heavy, that can be disasterous.