If you want to be wired use a splitter from your 1.3 RX to the Fat Shark Cable to your goggles.
If you want wireless (what I use) do a repeater , 1.3 RX out to 5.8 TX which repeats the video from your 1.3 to a 5.8 TX to your goggles.
Since your in close proximity to your goggles all you need is a the 100mW 5.8GHz A/V Transmitter (FatShark) which I believe comes with the goggles.
Works Great. Let me know if you need a pic of my ground station. I'll post one this evening.