You can find the assembly notes of the Mini Bivert module for the Game Boy DMG-01 after the GB Pocket Notes =)
Game Boy Pocket Bivert
The mandatory step: Cut the signals from the CPU to the LCD.
Apply a little bit of tin on the bottom of the Bivert board, on the small pins (the color data pins from the CPU to LCD). Then you only need to heat up this pins without adding more tin.
*It’s recommendable to use a little bit of flux.
If you can’t center the module correctly, you can desolder the capacitor and solder it back again when the signals are correly soldered.
Game Boy DMG Bivert
The mandatory step: Lift the color data pins from the LCD connector