Where do I plug-in the usb cable?

100 entries today! I thought I would celebrate, but it is just me and the cat at Soup Mansions at the moment, so it looks like it will be a carton of lactose free milk with two straws! Wanted to take a historic snap with a historic camera, but had conecivity problems.
 
As it hasn't rained for some time (see this), and it is bright 'till late, I took out my road bike to commute to work today. What a difference over the hybrid - no grinding noise when going up hills for a start (the bike, not me) I was feeling quite smug, until a petite young lady whizzed past me on a Brompton. I need to re-engage with the font of comuter knowledge that is Silly Commuter Racing.