So I have the 1 router (CCR) connected to 2 cloud router switches (CRS-1 & 2) and one AP like this: Switches and AP are connected using SFP+ on the router CCR. How could I ma,age each device by connecting to the router. I put all of them in a bridge. By doing that I'm ensure winbox will find them. But is there a better pattern for it?

If your main CCR not have a ISP connected and only that LTE device can provide you a internet access THEN ONLY VIA LTE YOU CAN ACCESS to internal LAN, easy.
Next should be questions like,
you have a Public IP at LTE ?
Your ISP not give Public IP bcs you are in CGNAT then what a remote/cloud service you use to use it PublicIP and go into LAN...
You like drive every time to that place or want do that remotely?