The polar scope illumination is usefull. I made this simple illuminator for my EQ5. The first part comes from a led pen (this one was a gift from Teleskop service ).
I cuted the pen (keep the metal ring).
The EQ5 mount needs a 34mm tube. This one was drilled, and the I glued the metal ring.
The pen can now be plugged into the metal ring.
... and on the mount :
Best regards !