putting my eibach coils on 5100

So ive tried searching the internet and cant seem to find my answers so sorry if its been brought up lots.

Im going to be putting my lift in this weekend (doing it myself) and im just have some questions about putting the coils on the shocks. Is the only part from my old coilovers I have to use the topcap or whatever you call that part? Second, how far do you wind down the top nut that holds that topcap on? Do you bottom it out on something or is there a specific height you put it at?

Thanks in advance people