I ran mine through the sail mast and through the PVC. Eagle's have the small connector that do that.
Here my post from a few months ago
This is my design
Using the sail mast receptacle
However I detached the original base and crafted a double pivot base with a transducer wire pass through
Hope this is helpful
None of the pieces are glued down especially the cap
Sometimes you might need to take a section off to more easily pass the wire
The whole assembly goes into the sail mast receptacle including the pass through wires
Just
1. 1 2ft piece of 1/2 PVC
2. 1 four-way T
3. 4 90deg elbows
4. a 1/2 cap -drilled
5. 4 spare sections of 1/2 pvc l(like 2 in maybe each)
6. 4 in or so piece of 1/2 in pvc
__________________