how should i step cross over on 100.4

[Yang 2]

I have a 100.4 and mli 65 and SEAS Prestige 27TFFNC tweeters. What is a good starting point for my cross over settings. Thanks in advance

[KU40 173]

Maybe 3,000 hz? Going to have to play with both the high and low pass either way (up or down) to get the best sound though.