Left wrist

Ok, anon was wrong. It's not an autoclave. More likely it's a Microclave.

Probably for his oilchanges.*

Clave IV Connector Technology | ICU Medical

When you choose ICU Medical needlefree IV sets and connectors with patented Clave ™ technology, you get an effective barrier against bacterial transfer and colonization designed to help reduce the risk of bloodstream infections.. And since the same clinical protocol is used with all patient populations, you can standardize on a single connector…

More at:

https://www.icumed.com/products/infusion-therapy/iv-consumables/clave-iv-connector-technology

Yes, this company makes a "stopcock." (Can't make this shit up.)

*sponsored by PP