Depends upon what the socket on the guitar is like and where it is.
Normally, as others have said, an angled cable at guitar end and through the strap
But if it’s a socket like on a Strat, then I go for straight end but still through strap
I’d probably also have a straight cable out of the socket on something like a Les Paul, or your Yamaha rbx 170 Y - in both cases, also through the strap, but thats just me.
Always a straight end into the amp though, and I sort of loop/tie it through the amp handle.
It’s not a stupid question btw - if you’ve only just started, then there’s going to be lots of things you’ll want to ask about, that may seem simple to you in a a year or so from now.