I'm using this cable: Amazon.com: Poyiccot USB C to Micro USB Cable, 90 Degree Left Angle Micro USB Male to USB C Female Adapter Connector Cable Support Charge & Sync for Samsung and Micro USB Devices(Left Angle) : Cell Phones & Accessories
I removed the bracket for the expansion battery, and then tuck this adapter down below the camera.
I added the usb-c bulkhead to my A6400 Housing setup. Works great. I charge from a battery bank between dives, and I don't need to break the vacuum to change a battery (or break down my kit if using my fisheye which is front mount).
If I'm diving the same lens the next day, I'll leave the housing sealed overnight and charge from the wall.
I do believe a fisheye can handle most everything other than macro. CFWA and WA can be handled with the lens. With a teleconverter and a port extension, you get a narrow view to rival normal kit lenses.
I shoot a Tokina 10-17 on my sony system, and will be adding a TC and 20mm port extension to make it a more "normal" lens for night dives and such when I don't want macro.
I don't even travel with my kit lens anymore.
After having a no name float arm come apart underwater, I also moved to stix. I have a combo of jumbo and regular and they work great and I don't need to worry about them coming apart.
I agree, this should work with the A6700 housings.
On the pre 6600 housings, the vacuum LED was so close to the hotshoe, even the trt unit wouldn't fit.
I also use this bulkhead with my A6400 housing. Have an adapter cable tucked in where the battery pack normally goes to get the micro USB connection.
I only use mine for charging in between dives, but it works great and means I don't need to break the vacuum all day, or even at night if I'm shooting the same lens the next day.
When I tried a s-turtle in my A6400 housing, the vacuum LED was in the way.
With the deeper a6700 and the LED being on the back of the housing, I'm surprised it won't fit.
OP, looks like you're shooting APS-C, when the FE50mm 2.8 is a FF lens.
For APS-C, The Zeiss Touit 50mm is IMO the best choice of macro lens in the 50mm focal length.
I'm stuck with the fw50 batteries, but charging between dives via a powerbank has made it not an issue anymore.
I don't believe any of the other a6xxx series will fit in your 6000 housing. From my research, the 6100/6400 were closest externally. I didn't look much at the 6300/6500, but they're all quite different than the 6000.