Effect of zero padding an odd symmetric FIR filter in the time domain
The three options you mention all result in the same magnitude response. The ones with zeros before (to the left) of the actual impulse response will just add delay (as many samples as there are zeros). The last option has exactly the same frequency response as the original filter, without any extra delay.

I think it's pointless to add extra delay by prepending zeros. Zero padding at the end is OK, if you have a good reason for it.
If you really want a filter with $1200$ taps, why wouldn't you use the extra taps to get a better filter?

If you need a linear phase filter with an integer delay (in samples) then you could design a filter with $1199$ taps and append one zero tap at the end (if for whatever reason you need exactly $1200$ taps). This is because the delay in samples of a length $N$ linear phase filter equals $(N-1)/2$, which is only integer if $N$ is odd.