Which one suite for this device

I want to install openwrt in my dlink dsl-2750u wifi device. I have tried this below Link but not able to install. Anyone tell me which one is correct for my router


Welcome to the community!

What installation steps did you follow?

See: https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=8eeb57acb75f9d89abed59595de052dba9fed7b8

Thanks for your response. I have tried to install via emg backdoor like same your instruction steps but not get install. I used [Firmware OpenWrt Install URL] file to install.