cartridge pin identification

Anewbie question: L channel R channel connections on the back of the cartridge doesn't appear to be marked. Is the L channel on the R side of the rear of the cartridge ( the righthand two pins). The reason I ask is that after playing the HiFi test lp I found that my channels are switched. All other connections are correct. My cartridge was already mounted on the arm when I purchased the table and arm. It came with the white and blue leads on the L hand two pins when looking at the back of the cartridge. Is there an industry standard that I should be aware of? Is there any reason that just switching phono cable leads would not be acceptable?
My apologies for what is likely thought to be a silly question; however, I'm wanting to not make any rookie mistakes especially this early in my analogue career.
Joe