Are you able to get infinity 2 which is an engineer install whereas infinity 1 is now self install in most cases
My concern is whether the previous damage will cause me any problems?
Might do if the engineer realises the cable was a DIY job as that's not allowed. I'd just let him get on with it and act dumb if questions about the cable arise. You might still be charged for putting it right even if you deny all knowledge.
I think the installer is unlikely to notice unless you draw it to his attention. The only downside is that if any joints have not been very cleanly made, or if you used poor quality cable for the patch, then you may get slightly slower Infinity connection, or even an unreliable connection. It will probably be absolutely fine.
He will just test at socket and as long within estimate that is ok
At one time you could within reason get the master socket moved as part of the Infinity install. If that still applies and it's feasible, perhaps you could point out "this old repair which I know nothing about" and ask the engineer to attach the socket to the incoming side of the repair.