SXT LTE6 kit with FG621-EA sim slot switch

Goodevening everybody!
We’ve buyed lots of new kit SXT LTE6 equipped on board with the new modem FG621-EA instead of R11e
In this version we don’t find anywere where to select the SIM card slot… in the old version under system - routerboard - modem was possible to switch from slot A to B.

I’ve read from command line is possible to change using UP and DOWN where UP is slot A and DOWN is slot B…

Is it real that in menu there isn’T the possibility of modify it?

thanks a lot, Davide

Pretty sure it is there on SXT with R11-e.
So it must be related to the modem ?

Already asked support about it ? Most likely they forgot to add it in Winbox with the new modem.