If you are running a Ready Made RC video system with their component style wiring harness, hooking up the MinimOSD is exceptionally easy, done with off-the-shelf wiring, and takes under 2 minutes.
The only soldering required is installing the pin headers onto the OSD. The only wiring mistake to be made is plugging on the video cables backwards. If you power up to a black screen, reserve the cable and that fixes it.
Here is all you need:
1 ea. JST Female to Molex Power Adapter (ImmersionRC/FatShark)
1 ea. RCA Female to RMRC Servo Style Connector
1 ea. RCA Male to RMRC Servo Style Connector
1 ea. Battery Tap with T-Connectors
This looks like you have +5v and ground coming from the APM _and_ +5 coming from your fat shark power supply. Does the MinimOSD allow multiple power sources like that?