OV7670 Camera Module - wrong pins?
They are actually named in a different manner. 

Your camera module has i2c interface.

SIOC is nothing but Serial Input Clock , same as SCL - i2c clock

Similarly , SDA and SIOD are the same - i2c data

HREF and HS are the same too - Hsync signal

MCLK and XCLK are the same too - system clock

Here is a useful link: 

https://www.google.co.in/amp/www.instructables.com/id/OV7670-Arduino-Camera-Sensor-Module-Framecapture-T/%3famp_page=true

Cheers !