Repurposing your rear defrost relay as a hard start relay

[Deebs]

Wanted to post this here and get some feedback if I need to correct:

Green Arrow connected to terminal #30 on relay. Other end connected to positive battery post. 15 amp inline fuse wired in as you can see at the bottom. (12 AWG wire with 15A fuse). Adequate?

Blue arrow: Ignition switch wire to terminal #85 (stock wire from new wiring loom).

Red arrow: Terminal #87 directly to terminal #50 on starter solenoid (same new stock wire).

My understanding is that this is grounded through the chassis, so terminal #86 was not used.

(Ignore the black wire laying in the floorboard, that was originally for the defroster).

All spliced connections were spliced with heat shrink butt connectors and then a layer of marine heat shrink.

Also, I wired in a 15A inline fuse in the trunk for the ignition coil positive wire. 15A safe up there as well? It's put in about a foot after the black wire leaves fuse 12 at the fuse box.