Static routing on a TP-Link TL-WR1043ND

I know what's going on. You leave clear with the address you are using on the routers and what you say: "I am able to connect from a wireless device to a wired device, for example SSH-ing from 10.89.7.X to 10.89.49.Y, but it doesn’t work the other way round" The way you have set it up, doesn't allow it.

Since you wanted all devices to communicate with each other, you shouldn't have them in different LANs rather use the same for all devices. So you network arquitecture approach failed there.

Let Router1: be the router directly connected to the internet Router2: be the other one.

What I would do is disable the LAN DCHP Server on the Router2 and change the cable from WAN to LAN. (Cap WAN port) Also, give it (Router2) a Router1 LAN IP Address on its LAN port, so you will be able to get to it via its HTTP Server