[Elecraft] KX3, Yamaha CM500 headphones and PTT switch

[Esquer Dave]

Hi folks,
Newbie Dave with a KX3 and a brand new pair of Yamaha CM-500 headphones. I need a PTT switch. I’d like to build one. Is it as easy as wiring a momentary PTT, using the ACC2 port, the ACC2 I/O ON menu settings and a 1/8” mini jack?

Read both the Elecraft manual and the Fred Cady book, still a little confused.

TIA and be kind,
Dave
K6WDE