Disconnect them one at a time and see which drivers go out.
Are you sure its a good idea to use different cap's? There may be some negative effects, but I can't say for sure. You may want to find a DIY website and ask there.
I have tried both the Jantzen Silver Z cap and the Mundorf Supreme S/G/O.
I went with all Mundorf Supreme S/G/O caps.
The Jantzen are very good but can be a little too harsh, but that would depend on your crossover point. I am crossing my ribbon tweeters over at 2000Hz which really revealed the harshness in the Jantzens.