Thank you, I don't think its a mod as they are the only holes drilled for them I had seen pictures of other, where the strap button was lower down.
It is a nice bass and feels really well made and the pickups are quite hot & loud in it,so I won't be changing them they are good enough as they are. I took the tugbar off as the Ric version was made of clear plastic IIRC. One gripe I have is that the action on this bass is better than I had on my '92 4003, I could never get the action on that bass as low as this one.