These have Two Types in the models of the Saturn.

These mostly have Yellowed as pictured.

 Each lock in hole is the same as pictured.

These has on slot in the back that lines up with riser to push on or pull off.

These are Fragile so do so cautiously.  

Some Model Saturn use two of these on either side. 

This is Yellowed Long Round Type as pictured.

It is for the One LED Riser.

The last few photos show the Yellowed as pictured.

I don't have any Clear white ones.