Where is the neutral safety switch?

NO.

Here's the deal

All manual trans cars came with ONE push - on connector on the start relay until the advent of "clutch safety switches" in 70 and later. Then they used the same relay, with TWO push on connectors, as the automatic cars. So the clutch safety switch was on the clutch pedal linkage

My 70 (sixpack RR) also originally had a reverse lock on the linkage, IE you had to have the 4 speed in reverse before you could lock the column. My friend that was the first owner had removed the link, and I wasted no time in removing the clutch safety switch. In over 140,000 miles, I never once "needed" all that junk

Earlier (68? earlier?) cars with automatics had the NSS on the shift linkage

Later (69? later?) cars with automatics had the 3 terminal NSS down on the transmission.

The only thing the 69/ earlier stick shift cars had was a backup light switch.

If this is something you are concerned about, I guess you could easily add it. The clutch switches were not run through the bulkhead connector, but rather through a separate grommet. So you could buy an "auto" start relay, add a wire and rig a switch to the clutch pedal.