Help: Onboard battery soldering location?

[MarcPaquette]

Kind of issue?
Assembly

Which Board?
RGB

Which Board Revision?
RGB = 2.1

What steps have you taken

• I have searched the Issues page
• I have read the documentation
• For LED issues I have checked the following things
  - the pro micro is programmed (and currently telling the LEDs to do something)
  - the pro micro is powered (and showing LEDs)
  - the LEDs are powered (check 5v across pins 1 and 3 of J1)
  - are any of the LEDs showing

What is the issue?
I'm running a Nice!Nano V2 using ZMK firmware. I'm using this as a Bluetooth keyboard with wireless connectivity between the two halves successfully for about 2 years now.

My question is this: Is there a place on the PCB where I can solder battery connections or must it be done on the Nice!Nano only?

My apologies if this is a silly question, my knowledge of PCB's & Schematics is limited

[MarcPaquette]

Build here: https://x.com/paquem/status/1477730721791942659