quick question about pistons

[sam starlet]

hi guys as above, I have seen most pistons with two rivets or cut outs right next to each other usualy at the top of the piston but they are next to eachother. like this http://www.jegs.com/images/photos/800/867/867-149721.jpg

I came across with them at opposite ends in a starlet, does this mean anything at all?

Im just curious thats all

Sam

 

[sam starlet]

any one?

 

[mork]

They're just for the valves to go into.