Hazard switches, while cheap to replace, can often be fixed with a soldering gun in 5 minutes. The switch easily unplugs for benchtop repairs.
Speedo cable R & R normally requires removing the drivers seat, carpeting and rear upholstery panel & access door, then routing the 10-ft-long assembly with gentle curves thru the rear firewall clear back to the middle of the ZF. Tie-wraps & clamps will be needed.
The biggest danger in working with the ZF right angle adapter is, if you pull the 10mm bolt just below the adapter, an extension shaft inside the ZF will slip down into the gears. This has the capability of cracking the main case if you try driving with this 4" shaft laying loose inside, as there's not much space available. I've stripped & TIG-welded one case cracked from this, and you do NOT want to experience this! It also normally ruins the $300 extension shaft and no one is reproducing them at this time.