Whoa. What kind of language are you speaking? Isn't optiplex a name of a line of Dell's laptops? Isn't a dongle like a security key or something? What is a read an crystal array? Optical drives have jumpers? What the heck is uniplex? It's not in the dictionary. If I have a remote control between the psu and optical drive then that would only control whether or not the optical drive gets power. It wouldn't eject the tray.
Anyway, I bought a N.O. (normally open) momentary push button switch from radioshack and used it on an old computer, and it works. I didn't even have to remove the other push button switch. But the computer doesn't have an operating system installed so I don't know if the drive can read disks. I have yet to try it on my useable computer.