7c81 + 7i73

Hello all! I'm new here on the forum, I've been searching for a day or so now and can't really seem to figure this out. I've been using the machine with a rpi4, with the 7c81 running the 5abobx2 bitfile setup for a little while now and decided to expand with the 7i73. From what I've read, when using pncconf I should see the 7i73 or at least a way to set pins on the smart serial interface, right? So far, it never seems to show up. I have it connected to the 7c81 via a cat6 cable, and I have a power light on the 7i73. I've set the jumpers on the 7i73 to all the default locations (terminated serial, no lcd, no keypad). when using mesaflash to check the config of the 7c81, I can see the smart serial interface. I feel like there's something very simple I'm missing. I hope this isn't a repeat question, I couldn't find it here. I appreciate any help you can offer

  Module: SSerial
  There are 1 of SSerial in configuration
  Version: 0
  Registers: 6
  BaseAddress: 5B00
  ClockFrequency: 100.000 MHz
  Register Stride: 256 bytes
  Instance Stride: 64 bytes