Host Only Netowork Host IP adress change

Hi,

I have a host only connection setup with /26 network. Start adres is: x.y.z.10 and end address is x.y.z.29 on dhcp connection. I need to use x.y.z.1 and x.y.z.2 on guest network. I checked Connect Mac to this network. Even I change on Mac network connection it is assigning x.y.z.2 to host Mac.
How can I change it on Parallels site?
Version is Paralles Desktop 12 for Mac Pro Edition v 12.1.3(41532)