PDwestman answered your question. The energy the charger puts into the battery through those small wires in several minutes can be pulled out by the starter in a few seconds and fry the small wires. I quit using those two little bolts on the seat years ago. The seat is not going to fall off with me sitting on it and I can pop it off any time I want without having to remove those pesky side panels.The float charger connection probably has a 5 amp fuse and the wires are only large enough to handle maybe 10 amps. The starter motor needs about 75-100 amps.
So the answer is a definite NO..............
The starter won't take any more current through big cables than it can pull through the small stock cables connecting it to the battery. It is like a 1" faucet connected to a 1" or a 6" pipe. It is still just a 1" faucet.