[Elecraft] K2 C111 polarity not marked

[Paul Bruneau]

Hi Gang-

K2 #4818 here, Control and Panel boards complete, working on the RF 
board, but C111's polarity isn't marked on the board or in the manual!

I assume that the square pad is positive and the round pad is negative, 
but I don't really want to assume...can anyone verify for me?

Thanks,

Paul
KB8NMZ