RXZ added a post in a topic Does anyone know how to flash TWRP Recovery 0n Y300 without using Fastboot?
If you're using stock [rooted] Install reboot manager from Google Play
Open RebootManager > Reboot Bootloader > you will stuck on Huawei Ascend Logo (Fastboot mode)
now you can connect the usb cable..
to check the devices connected or not.. use fastboot devices
Looks like im not answering your question.. LoL Sorry..