You will need a PC-Link module, a Feedback module or a PC-Logic module, they all look the same
From the list of components you shared, it seams you do not have any. Then go for a PC-Link module. They are plenty on second hand market.
Next, your need to connect this module towards your HomeAssistant server, 2 options over USB or TCP/IP with a bridge.
Common to both
RJ11 cable
RJ11 to DB9
Here is a tutorial about the USB cable
(Home-Made Cable RJ11 / RS232 (DB9) for Niko PC-Link - MForge)
There are many cable configuration possible, if you go for home made, you will be sure of the config of the cable. If you buy already made rj11 to DB9 make sure it matches the wiring diagram as descripbed in the tutorial.
if USB
USB 2 SERIAL
if TCP/IP
HF2211
Detailled config for HF2211 is available on my github