They are an ok sequential,
however this is about the shift inserts, if you look at the photos carefully they are from the last of the 5 speeds.
pictured is the 3rd and 4th shift insert keys, 2 are in the pictures uploaded by the topic creator, This needs to be rectified otherwise He will cause more damage in the transmission pretty soon if he does some hard shifting.
the inserts pictured are superseded and discontinued.
The new keys you can get from Nissan are slightly different to the original found in factory gearboxes and are actually not right. The hump on the top of the superseded part is too large and the slot for the spring underneath is too small so you can’t lock the cir-clip inside it, only behind it.
this is not efficient in hard shifting and can cause the keys to fall out even easier .
try find someone that has the original part number, like you have shown in the photos. I would get new syncros and c clips and also a new shift sleeve whilst you are at it.