SIONYX Nightwave Digital is Raymarine Compatible
Details here:
Whatever Raymarine display you have please always upgrade it to the latest version
before beginning bench testing of the Nightwave Digital
You will directly connect the output of the Nightwave PoE Injector to your Axiom using this RayNet to RJ45 (Female) adaptor cable (Raymarine SKU A80247):
https://www.raymarine.com/en-us/our-products/networking-and-accessories/raynet/raynet-female-to-rj45-female-adaptor