Thanks Magnetron. I've been thinking long and hard about my install and think I found the products I will try (can always replace, they're relatively inexpensive). I have 2 TZT3 units so I need double of everything.
At my helm, I have a hydraulic hatch for the electronics panel and accessible, but painful to easily reach, access underneath. The hatch itself is basically a sealed cabinet with a wire chase and I don't want to have to climb into the access or pull the panel to reach the harness.
I wanted a plug that I can put on the electronics panel with easy access to either USB cable so I went this this:
https://www.amazon.com/dp/B01MY1WDIU?psc=1&ref=ppx_yo2_dt_b_product_details
For the Micro B harness cable, a M/F adapter will be needed:
https://www.amazon.com/gp/product/B01C6032G0/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Those parts should address the USB connectors, but I also wanted to extend the HDMI in (
https://www.amazon.com/gp/product/B089QJT3PG/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1 and audio cables
https://www.amazon.com/dp/B08YJMPPPF?psc=1&ref=ppx_yo2_dt_b_product_details to the underneath access if needed in the future.
I'll be bench testing these components in the next week or so, will report back on how it works.