Unfortunately I didn't take any photos as I was rushed during the install.
To clarify, The tweeters are NOT crossed from the front door speakers. What this means is that there is one set of wires coming into the door for that speaker only. The tweeter wiring originates from elsewhere (probably pigtailed at the head unit?)
With that said, I did exactly what you are planning to do for stage 2, however, I did have to cut wires for the tweeters. It is possible that you could make an adapter harness to avoid this but for me it was simpler to cut and splice.