TP-Link TL-SG1005P, 5 Port Gigabit PoE Switch, 4 PoE+ Ports @65W, Desktop, Plug & Play, Sturdy Metal w/ Shielded Ports, Fanless, QoS & IGMP Snooping

Forget the POE injector and just use one of these https://a.co/d/0bmROPvp since it can provide POE+ to both outdoor devices and still have ports for more later. Far less bulky than multiple adapters and it also frees up ports on the router. I have a few of these in a drawer for whenever I need a quick POE+ connection somewhere.

As others have said, those blue cables are more than likely CAT5 capable of handling Ethernet. You would want to buy a few things to be able to use them as Ethernet RJ 45 Plugs (Pass Through): RJ45 PlugsCrimping Tool: CrimperWire Strippers: Wire StrippersCable Tester: Cable TesterNetwork Switch: Network Switch You would strip the blue wires back enough to crimp the RJ45 connectors on to them, and then use the cable tester to ensure that all 8 wires crimped correctly and find out where the run goes (which wall jack in the home) Then use the switch to plug all the cables into and you have a network with Ethernet now. The switch I linked is probably overkill because its really meant for an Omada system, but it works well for powering devices over Power Over Ethernet like Wireless Access Points or IP Cameras... I did this at my first condo in 2018. Took me a few days to get the crimps right and figure out where all the lines went, but once I did that oh man it was so nice having wired Ethernet. I did this again in my single family home when I ran the cables myself, that took longer but the result is so worth it.