Router TL-WR743ND - what can I do?

Hello there! I am new member. I have router TL-WR743ND
So I want install Open LEDE firmware, but in router not available USB or COM-port for connection. :((
Can You please advise what is better solution for me? May be I can solder some adapter inside?
Thank You very much for answer!

Flash either this file for v1 hardware or this file for v2 hardware in the web interface of your router and after flashing it your router should run LEDE. That's it, nothing more.

To find out which hardware revision you have 9 out of 10 times it's listed on the back of your router.