I replaced the link with a real link in your quote above.
- Open system.lua in the modules folder of your SX_Databar install.
- Scroll to line 129 or use a search feature to find fpsFrame:SetPoint
- Change the whole line fpsFrame:SetPoint("LEFT") to the following:
fpsFrame:SetPoint("CENTER",systemFrame,"LEFT")
I did not install this addon and have not tested this change, but after reviewing the code, I am confident this will shift the fps frame a little to the left. According to the screenshot you provided, the shift should work just fine and leave a gap roughly equal to the gap between the latency and that loot symbol.
If this gap is too large for your taste, you can use the following:
fpsFrame:SetPoint("CENTER",systemFrame,"LEFT",10,0)
Keep the 0 and adjust the 10 to your liking. The higher that number is, the more right the fps frame goes.