53 plate. sorry, i guessed that was a bit obvious.I don't think Suzuki was making a Wagon R+ in 1953, and if they were, for sure it didn't have OBD, so, be a little more clear about what you're asking and let's see if we can sort this out. There is a requirement for the diagnostic connector to be within a certain distance of the steering wheel, at least with OBDII, and as a result it's almost always under the dash near the steering wheel. Some of the early fuel injected Suzukis (1989 era) did not have OBD connectors, but I don't think the Wagon R is amongst those.
You'll still need to explain what a 53 plate is - it may mean something to you, but, as I'm sure you are now aware, most of us are not familiar with how registration numbers are assigned in the UK.