Normally the mini breadboards I have do not have power rails running along the edges but only have column pins.
If its like these then you have no issues - just be careful as to what connects to what (as normal).
This may be of help if folk are new to the mini breadboards https://learn.pimoroni.com/tutorial/170 ... breadboard
Sorry for the big pic from RasPiO - its 10 times life size I think and Google have taken the 'small' off the search tool
edited: To shrink picture a bit
Need Pi spray - these things are breeding in my house...