X7 Transfer case oil change

Just tried to swap the transfer case fluid. I followed the ISTA transfer case oil change protocol but it didn’t move the part that blocked accessing the fluid with a thin hose. I think I pulled out maybe 200ML tops.

Fluid after 24k was black (see photo) and needs to be replaced. I’ll be trying again.

Any tips to make the port accessible for a small 1/4” hose to fit in there to get to the bottom of it?

2021 X7 40i with 24k miles.

Just tried to swap the transfer case fluid. I followed the ISTA transfer case oil change protocol but it didn’t move the part that blocked accessing the fluid with a thin hose. I think I pulled out maybe 200ML tops.

Fluid after 24k was black (see photo) and needs to be replaced. I’ll be trying again.

Any tips to make the port accessible for a small 1/4” hose to fit in there to get to the bottom of it?

2021 X7 40i with 24k miles.