On-prem installation with multiple servers

Hi,

I am about to install DW on-prem with front and backend services on one server, and fulltext on a second server, which also is the SQL server

I'll do the front and backend server first, but when I come to the fulltext server, should I then select "extend an existing docuware system" when installing?

Where can I find documentation for installing on multiple servers?

I tried it out, and it was "extend an existing docuware system"