It's the standard Rick LH bass neck arrangement. Here's a pic of four LH ricks
So it seems that Rickenbacker never bothered to build a dedicated LH neck for any of their basses, but simply used a RH neck and fitted a different nut and truss rod cover.
Maximus, just for future reference, it's not ideal to use Gorilla Glue for neck fixing. It's a very strong, permanent glue and if for whatever reason you glued your neck in slightly the wrong place or it was at the wrong angle, then it would be impossible to remove.
Standard Titebond (the bottle with the red label) is the normal glue used for guitar work as it can be removed using either steam or heat. I'd avoid other 'stronger' Titebond glue variants as they are water resistant. If you can't get out to a store, then I'd buy from eBay or Amazon etc. and have the glue delivered.