It seems like you'd rather use the PnP kits than DIY it, but you listed a soundcard in addition to the PnP Warrior kit. Those don't go together. You're mixing levels there.
EDIT: Just beaten by Snakeeyz. His lists look better so I took mine out.
Here's the descriptions of what you get in the kits:
Warrior kit includes battery sled, velcro wrap (for spacing in the hilt and securing battery), and wires with connectors. If you want to add a recharge port to the Warrior kit you will need to do that DIY.
Champion kit includes Sabercore soundcard in your selected font (Crimson or Viridian), battery, battery holder, and hi-bass speaker all together in heatshrink wrap with wires and connectors, plus the recharge port.
Hero kit includes everything you need; SparkColor2 soundboard plus microSD card with 5 fonts, hi-bass speaker, battery and holder (all in heatshrink), recharge port, tactile switch, and RGBA LED module.
If you want something different than what the kits offer, then you're off to DIY-Land and someone other than me should help you with that.
To your question of where the recharge port goes: It goes into one of the two switch holes. The only reason to put it elsewhere (unless you just want it elsewhere) is if you're using two momentary switches for the Hero level (which would involve some DIY wiring) instead of the tactile switch (which is two buttons on one switch).