Question about installing opencore after os installation

OpenCore Legacy Patcher (OCLP) is prompting me to install core on a USB or internal drive after Ventura was installed to an external SSD (I used an oclp created usb installer).When I chose to install the core, I got the above screen. I had chosen the model for my imac (imac15,1) when I created the installer and built the core prior to installing the os on the external ssd.

In a nutshell, I am using a macbook to create a Ventura external SSD boot drive with oclp for my imac.

I am not sure what to do with the displayed screen. How do I get the core built and installed onto the external SSD at this point? If I boot up the imac from the external SSD at this point, I would get the circle with diagonak line through it icon.