pinout questions: Meduino Mega2560 R3 Pro Mini ATMEGA16U2

indeed!

it isn't marked on the images i posted links for but it is marked on the 2e board which i have to test on..
it was just difficult to see because of the headers i soldered on that one.

you have no idea how happy i am right now and how greatfull i am for your reply.
i can now complete the wiring (first the diagram and then the actual wiring and finish it all up!

much much appreciated.

wishing you the best weekend ever!

kind regards