[CA] Add chartplotter to legacy instruments?

[Dave_in_tampa]

Hi – hoping I can get some help/validation on my upgrading of the Nav system. Not sure which chartplotter I am going to decide on, but currently looking at 9inch displays from RM es97, RM Axiom with remote, Garmin 942 and B&G (zeus3).
Boat is 32’ sailboat. Mostly day sails and light coastal cruising (W Coast of Fl).

Goal 1 – add new chartplotter still leaving my self open for future expansion.

Later goal – upgrade existing instruments (wind/depth/etc) as needed (for future) – not addressing the details of that now, but don’t want to be “locked in.”

Current instruments: see diagram, but I’ll describe it as SmartPilot (w/wheel drive) and ST6002 control panel, ST60+ Wind, ST60+ Tridata. Separate power is supplied to AP and to Tridata. Red power wire is cut between Wind and Tridata.

Proposed to add chartplotter and STng to ST1 converter (see diagram). Current power connection to Tridata would be moved to power spur cable to converter. Chartplotter would connect to the other spur on converter. STng to ST1 cable will plug into converter. 2 terminators on each end of converter. Chartplotter will have separate power feed from breaker/switch panel.

Q1 – does my diagram look ok?
Q2 – I believe my entire backbone is in the converter – is that correct/ok?
Q3 – will my sensor info (wind, depth, temp, rudder position) all flow to the chartplotter?
Q4 – will my chart plotter have any control over the AP?

Future expansion:
Q5 – would likely hook chartplotter to radio via 0183 – this should not affect any of the above – correct?
Q6 – future expansion of the backbone would be as simple as remove a terminator and add more backbone, T or 5way connections with future items (like AIS, or itc-5/i70/etc) and finally a terminator -correct?

thanks...Dave in Tampa