How to combine 2 sxt link

Hi guys,
I have 2 SXT link between two factory.
I have 90Mbps bandwidth in each sxt link. now my employer wants to combine 2 sxt link on one for obtain upper bandwidth near the 180Mbps.

We havegigabyte switch behind each sxt for crossing traffic to the network.

Now I don’t know combine 2 sxt link on one…???
to combine please tips me.

Many Tanks guys.

see your switch support LACP or not…
if have, then enable it…

Thanks for response.
I have to see that. But I have a question, LACP what is the user of in switch?

see this…
https://www.youtube.com/watch?v=s4y0jQTYWas

Thank you angboontiong.
With LACP I can solve the problem