Remove the right main control board module by hand vertically upwards, this control board is removed from the charging control board below.

Let's remember where each wire is connected.

Connect to the top control board

Bluetooth signal cable

Front and back paper cone full-range speaker connections. Note: The control panel is labeled "REAR" (2pin) and "FRONT" (3pin).

Thin Series Wooferconnect(2pin)

Cables for connecting the battery