Hard to say, I have no idea what your schedule is like, how you recover etc etc
I personally would do them on the same days you squat, at the start of the session, they make a nice warmup for the heavier weights later in the session and prime your nervous system for speed.
just have to reduce the overall session volume to accomodate, and since these are neural training means anyway, there is no need for high volume - especially if you do them twice a week. 3x3 is enough.
don't forget periodisation! You can't do everything at once and maintain a good level of gains. You have to juggle.
Emphasis is on strength means pre-season and then move over to explosive and power means inseason, while still working on strength but with less importance, or just maintain.