Surface Grinder question..B&S 618

On the back of the table ways is a group of roller bearings running in a double V.. V on the bottom and a matchin V on the to of the base
Are they supposed to be laid in the same direction..or alternating directions?
[\\ //] Seen from the end ----> Front of machine
or[\\ ] -----> Front of machine
Or [ //]-----> Front of machine
This is a 618 Ramco..but its alleged to be a clone of the B&S 618
Ive had this in my shop for a number of years, use it regularly..but it started getting gummy so am going to take it apart for cleaning etc.
Just was never sure if the rollers were in correctly
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