Starter solenoid relay

[heronscourt]

I’m rewiring a series 1.5 roadster, 1968. I’m also converting from LHD to RHD with new RHD looms. The old relays are covered in paint and verdigris and I’m struggling to identify the type (part number) for the starter solenoid relay together with its position in the car. I’ve managed to identify fan, horn and alternator relays and I think I know their positions but any info which would confirm my thoughts would also be helpful.