1 connector (under multi-port) on opposite side before flipping the motherboard up is friction-fitted.

On reassembly, I put the motherboard in place with one screw lightly tightened on the side of the board opposite multip-port connector, then used one of the longer screws to hold the motherboard in place but loose for more space while I inserted the multi-port connector.

It worked well. This connector is designed to be inserted with the motherboard in place. There is a cut-out in the motherboard that allows you to push the cable in). MB charge motor connector.