[NAME]  It is impossible if you want to mantain the nvme disk working in the right side... the two upper bay are to Nvme SSDs. It is because in the right side bay, you have the Nvme connected in to Module 66XHV (google it and check images to understand). In the left side (of upper bay) is empty and that connector are to another 66XHV module (who connects the NVME SSD inside of this module). Then, if you want put HDDS in the Upper side bay, you will need to remove the piece 750-ABDF (google it and you will understand). When you remove the piece 750-ABDF no one upper bay wont work with nvmes (because this piece have 2 connectors, one for each 66XHV  when installed in the upper bay slots).And if you want put another NVME SSD in the left side of upper bay, anyway you will need to buy the piece 66XHV who is the only piece compatible for that sloot in actually configuration of your machine.Then, if you remove the piece 750-ABDF you will lost the Mini Sas connection and will lost the NVME Drives capability for that upper bay slots. ps: You will receive the upper side full with Piece number 66XHV only if you buy 2 nvme disks from factory. Later, you cannot to buy this piece with Dell... i tried and only way i found was ebay...
I got a new Precision 5820-2893 PC.  Upper right bay is used for 1 Tb Nvme drive. Two lower bays are connected to SATA on motherboard and working well, I inserted two 3.5 HDD drives. The upper left bay looks similar to lower ones, but when I insert 3.5 HDD nothing happens. HDD is not visible in BIOS and I do not see any cable connecting that bay to SATA on motherboard. Yellow light is flashing and that is it.  So my questions are:
How to connect left upper HDD bay to SATA in Precision T5820-2893?