If you got some black foam in the kit. Just place it in now, before you attach the motherboard. This is not necessary, but will protect the motherboard and the cables soldered to the adapter.

Attach the 2 screws circled in red. Be aware.

The 2 green arrow shows how you can route the L and R cables. The L cable needs to go the RIGHT side and the R cable needs to go to the LEFT side of the gameboy in this case. (This is because we have flipped the gameboy as shown in the picture, it's mirrored)!!

The last pictures shows when it's all good and when you are ready to follow the next step.

Do not forget to install the cable to the motherboard and to lock the connector.

Some models have a third screw circled in blue.