@JacekZebrowski 

If this is a route on router A the default gateway should be 192.168.1.160 since the Router A doesn't know about network 192.168.2.0/24 (that's the theory).

Even if you fix this route you still won't be able to access the network devices connected to router B - that's because of the NAT on router B.(these are home grade routers).

What you can do in this case is to use services on router B devices, if you open the corresponding ports (port-forwarding/virtual servers).

To achieve what you want, it's best to configure router B in AP mode. If it's a TP-Link router you can use this guide.

That way devices connected to both routers would be on the sane network subnet and will see each other without configuring any routes.