Kincony Server 16 User Manual

[electronics engineer]

I've checked the GPIO list on this link: https://www.kincony.com/forum/showthread.php?tid=5418, but I'm unable to determine which GPIO pin corresponds to each digital input. I want to use 16 digital inputs to control 16 relays. So far, I've managed to control relays using 8 GPIO pins, but I'm unsure how to utilize the digital inputs, as the pin information for these inputs is not clearly provided.