Explanation of icon.
Connectors for FDDs
Function name:Connectors for FDDs

These power connectors with four poles supply +5V or +12V to floppy disk drives.

Although the output voltage is the same as peripheral connectors, these connectors are small in size and used mostly for FDDs.

The way of the pin assignment is as follows.

Pin. No
Output
1

+5V

2
COM
3
COM
4
+12V