help on install c2050, can't find the 4 pin fan connector

The C2050 is listed with one 6 pin PCI-E power connector and one 8 pin PCI-E power connector and one 4 pin fan connector. I have no problem of connecting the two PCI-E power connectors, but silly as it as, couldn’t find the socket for a 4-pin fan connector described on the PDF manual. Can anyone give me some idea where to find it? Thank you.

Is it internal – direct from fan to card?

The fan connector is found underneath the the heatsink and already connected to the GPU cooler. No need to connect it yourself as it is already setup. You just need to connect the 6-pin and 8-pin PCI-E power cables.