Just ordered a pair...they are labelled left and right.

but that isn't what it means for tie rod ends.

tie rod ends are inner and outer. each is threaded differently.
depending on if it s rack and pinion or regular gear box steering, you need to see which one you need.

for rack and pinion, the inner and outer are very different.
for gear box steering, both ends can be swapped, but you need a left and a right, per side, as that denotes left handed threads or right handed threads.

this is how the adjustment is made, a center piece can be "tightened" or "loosened" and it will pull in or spread apart because the threads on each side are opposite.