How do they come apart? I've searched online, tried contacting tech dept but they never responded; they just swivel and will not come apart. I'm sure there is something I'm overlooking, obviously, but I've never seen a fuse holder like these before.

 

They are this style:

http://www.walmart.com/ip/32738734?wmlspartner=wlpa&selectedSellerId=0&adid=22222222227021668951&wl0=&wl1=g&wl2=c&wl3=51798753911&wl4=&wl5=pla&wl6=89207230739&veh=sem

 

Try pushing in each end and turning. Don't really know that's it but I have seen some that come apart that way.

Tried that, tried every which way but loose.... I guess I'm going to have to try and call them on Monday.

My merc has one like that, must be after market. I just pulled it today to inspect it as part of yearly maintenance. Push slightly, twist apart 1/4 turn and pull.