How to install openssl cert on local machine and how to combine them?

Example

Opent Git Bash and execute like the following

openssl 
pkcs12 -in C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\certificate_fc24d66b-7fdf-446b-85c4-b013d7371f17.p12 -nodes -nocerts -out C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\private.key

pkcs12 -in C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\certificate_fc24d66b-7fdf-446b-85c4-b013d7371f17.p12 -clcerts -nokeys -out C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\client_cert.crt

pkcs12 -in C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\certificate_fc24d66b-7fdf-446b-85c4-b013d7371f17.p12 -cacerts -nokeys -chain -out C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Main\cacerts.cer

After all install all certs.

Example combine

OpenSSL.exe 
pkcs12 –export –in C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Test\client_cert.crt –inkey C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Test\private.key –out C:\Work\ShopSberPayQR\Services\QRCode\Sber\Win32\sberPortalAppsCerts\Test\certfile.pfx