Westwood Lawn Tractor having electrical problems.

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Hello everyone and I hope you are all safe and well in these bizarre era. I wonder if one of you can help me. 
A few weeks ago the ignition barrel failed on my otherwise reliable and faithful 2001 model Westwood T1600 Tractor. I could start it with the key, but the key would either fall out and the tractor would stop or i would release the key from the start position and the key would not hold its self in the run position and again the tractor would stop. So i replaced the ignition barrel with an aftermarket one. 

When the new barrel arrived the terminals were not in the same order as the way my original barrel was wired. I managed to determine what a couple of the terminals were so I just guessed the rest of them, turned the key, blew a fuse on the tractor, rearranged them, turned the key, blew another fuse, rearranged them again............ turned the key .....no blown fuse but I must have damaged something in the process. I can now get the machine to run by turning the key in the new barrel to the run position and crossing the poles on the solenoid and that will make the machine run and drive fine, but if I try to start it with the key the relay under the starter solenoid just clicks.. in fact ive just gone to it and and tried to start it with the key, the solenoid clicked then its just blown the fuse, although yesterday I was using it all day as I described above.  

I could take it to a shop and get them to do it, but its a simple enough circuit, i just havent got my head around it yet. Can anyone here give me some indication of where I should be looking for faults? Have I wired the new barrel correctly? What am I most likely to have damaged through my guess and test procedure? Has anyone got a wiring diagram for this model of tractor? I have looked online but couldnt find the right one for my machine. 

Look forward to hearing from you.