Understanding Ports on DAC
The user guide to the DAC you linked should give you the detail you need.

On Page 9, the schematic shows that you can select 0V, -5V, -10V, or an external VREFN (the "5 gold circles" on the bottom in your PCB image). The 0V, -5V, and -10V are all generated on the board. Similarly, VREFP follows.

You can get VOUT from the center pin in the "5 gold circles" labelled VOUT. The surrounding 4 are ground. Ideally you would use a proper connector, not just one wire jammed in the hole. Or, you can get the output from VOUT_BUF, which has a connector installed already. See the schematic on Page 9 to understand the difference between VOUT and VOUT_BUF. From Page 16 you can see this is a "Straight PCB mount SMB jack, 50 Ω". You need an SMB cable.

You will need to supply DGND, VCC, VSS, AGND, and VDD via the terminals at the bottom of your image.