Recently bought a rig and have been slowly adding to it, it’s now come to the point where I need to add another PSU. I currently have 2x HSTNS-PL11 1200W and 2 breakout boards, [this one here](https://cdn.discordapp.com/attachments/399526656857079808/403657212905390080/Screenshot_20180118-210627.jpg)
The one currently working and in my rig seen [here](https://i.imgur.com/RTCchGF.jpg), and from what I gather it goes from the server PSU which is powering the GPUs, into the smaller PSU that powers the motherboard (i believe so both turn on at same time?). I spoke to the buyer who said I will just need a molex to a smaller 4 pin adapter, connect the 4pin to the “Main Detection Port” and the molex [pictured here](https://i.imgur.com/5rGnX3n.jpg) but for the life of me I cannot find this cable that looks right – I tried contacting the sellers of the PSUs/breakout boards but no response, so I think maybe I am totally misunderstanding? Has anyone any idea where I am going wrong?
Thanks in advance for any help