Normally that series motor was always mounted East West (head facing side), which is why the fixed side starter is located on the odd spot on your machine, as the motor is mounted north south instead.
The motor and cowl setup on the machine that preceeds yours (see photo below), was normally mounted the same way as the TaC so the starter faced the rear as normal.
I found the following pic via Google images showing the round blade Gadge mentioned.
[Linked Image from manuals4u.com.au]




Ahh, if only victa had kept producing the thumblatch catcher series, they would be in better shape today!