Hallo everybody, I have a teltonika rut950 and I'd like to flash an openwrt image that I compiled. As  don't know if it is going to work, I'd like to know if the router has JTAG or at least serial access to recover in case of problems. Is there anyone that knows it? I' ve seen that there is a connector on the router board. I think that may be for serial access or jtag. Is there a way to discover it?If I suceed I can post here a full tutorial so that also this router can be officially supported.
Photos of the router board can be seen here:
h***s://fccid.io/2AET4-RUT950/Internal-Photos/Internal-Photos-3550897

In the first two photos can be clearly seen a connector on the main board. I suspect that is for serial or jtag.

Thankyou to everybody for the help.