How to Use the Engine with ssl_read and ssl_write

Hi,
I currently want to use openssl with QAT in my project which use openssl for server to server connection with ssl. I set up the machines as the documentation with the openssl.conf. So is the only thing to add in the code "OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);"? I did that but I don't think my ssl_write and ssl_reads are using the engine. I am using the cipher ECDHE-RSA-AES128-SHA256.

I am not sure if there are additionally steps involved or what functions I can use to set it up as they are not mentioned in the documentation. Let me know. Thanks.