Disabling the "door ajar" chime should be easy - just remove the screw that holds the switch in place to get at it.
I would guess that the switch is in the closed position when the plunger is up, which causes the chime to activate. So, you just need to figure out how to keep the switch in the open position all the time. Probably a small piece of electrical tape, applied to the right contact, would do that. Otherwise, you can likely just unplug the wire...
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV