>>First unscrew the binding-post knob all the way, then lift up the little gold washer at the bottom. Below the threads, on the post, you will see in indent into each side of the post. That is where you put the 1/4-inch spade! See?

Cool !!

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8