top position switch / reverse lamp switch: same?

[Logan]

today i was replacing my top position switch and reverse lamp switch on my tranny (91 KA), and i found out that i had one reverse lamp switch and a neutral position switch. the neutral position has a different shaped harness than the reverse and top switches.

is the top position switch the same part as the reverse lamp switch? im assuming so since the part is just a "switch assem" #32005-21U10. do i even need the top position switch? the FSM says it deals with 4th gear, but i read some people just plugging it with a bolt, what does it exactly control?

[Logan]

just talked to the parts dept, they said the top position switch is actually a different part number as the reverse switch, but i swear they look like the same thing. oh well, i ordered one, if anyone needs the part numbers let me know. im running the reverse switch in the top position hole and have the reverse switch plugged in the tranny but unplugged in the harness. the car still runs fine, i just have no reverse lights.