Yeah, I thought it might be a circuit breaker at first, but I thought he said that the part in the picture was actually IN the slot? Whatever, I'm glad you cleared that up.
Should be easy enough for someone to go out and check the manual for the purpose and rating of that slot.
I'd do it but it is all the way down in the garage in the glovebox...

<yeah, I know I'm suddenly lazy> Maybe later.

Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black