The U-shaped shift collar at the rear straddles the low-reverse sliding gear. The front shifter with the narrow slot engages the raised ring on the 2-3 synchronizer. With the transmission in neutral and the shifter lockout on the side cover in the middle position, it should be very obvious where those parts fit, unless your name is Stevie Wonder or Ray Charles! The forward shifter with the narrow slot is notorious for getting worn, so be sure the slot isn't V-shaped.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!