FPV Model ZMR250 V2 Build Manual page 4

Install OSD
The OSD firmware must be flashed and compatible to the Flight Controller before installation. If you don't need to
install the OSD, please just skip this step.
Solder the pin headers onto PDB.
Install the OSD on PDB. Insert it onto the pin heads and soldered. After secured, cut off the unnecessary length of
pins.