NSS is on the side of the transmission, but up pretty high. Too hard for me to access while on my back under the car, so I let my Indy change it and replace the shift bushings 2 years ago. Recently had the same problem you described. Would not start after sitting overnight without shifting into "nuetral". Rest of the day it started oK in "park". As of late, this seems to have resolved itself and it has been starting in "park". Keeping fingers crossed.
Mark