Cascading LAN To LAN

I have 4G LTE wifi router (Huawei b310s-925)[Router A] has only one LAN port. and another router Prolink H5004NK, that I want to cnnect to router A, lan to lan(connected both routers using LAN ports on both devices), and use the internet on both routers and increase the wifi coverage, I tried...

I have a HP 3047h motherboard the chipset is AMD 785g(rs880) + sb750/sb710........it has 1xPCI 2xPCI Express x1 1xPCI Express x16, will this video card work...