Puzzlemaker in Portal 2

I want to connect 2 button to one single dropper. I know how to connect but split into 2 connectors isolated... I don't know how to. I'll make a example:

As normally, if i connect 2 objects to the dropper, the dropper will only launch a cube AFTER we press to 2 buttons in same time. BUT i want to do in a different way, the 2 button work isolated. As i said before, it will only work after i press the 2 in same time.

( "." = deactivated connector

"," = activated connector

"O" = button

"U" = dropper

"H" = cube)

O . . . . . . U . . . . . . O

Now, i will press one of buttons.

o , , , , , , U . . . . . . O

See? If i press one of them, the dropper doens't work! But i want a solution, i want press a button and it work! As below:

| U
| |||
|o , , , , , , H . . . . . . O

And that's i want. Some solution?