I think you either know and you are on already, or you don't know and just want a pure gamble, or you leave it alone as someone might know a lot more about the race than you.
Its a horse with no form that's been off a long time but is only a 3yo and could have improved a lot in the last 10 months. Its a low % trainer and the jockey booking doesn't scream gamble as they don't book him much and he hasn't ridden a winner for them in 4 yrs.