Help with Ga5-1 sewing machine

[sib1993]

Hello...just picked this machine Ga5-1 on Marketplace. Cannot find a manual on line. I need help adjusting the timming. Pictures or even a video of closeup up correct position will be greatly appreciated. Lower tension mechanism was missing, have a new one but have no idea how the springs go. My apologies for my lack of knowledge Thank you. Model GA5-1 

Manual and parts list would be appreciated in where to buy them

[Constabulary]

It basically is a modern version of the Singer 45K

Parts list an manual can be downloaded here:

https://leatherworker.net/forum/topic/104255-neels-saddlery-tension-issue/#findComment-696717