There is a Mini USB port near the ACSI connector but as Jookie already told me, it is a very tight fit for most cables.
Is it possible to power the device through the Micro USB of the RaspPi? A friend said, I should work as it is 5V on top and below. But I want to ask first

Are there more options? As the floppy emulation is missing, I am usure if the 4pin flat connector on top is for a floppy power cable or for something else?
A pictured guide would be awesome!
