What year? Looks like upper seat belt washer but you don't show the other side? You can look up parts by adding your year, model and trim level at lotusparts.com or lotuspartsonline.come

 

Part # A111W7132F M8x25 Skt Hd Cap

2011 Lotus Evora Screw - M8 x 25 SKT Hd Cap. Chassis, Black - A111W7132F | Lotus Parts Online, Birmingham MI

And if I remember right, lift the front bar to allow the slider to move to re-align.

 

Thanks all. There's a small metal receiver under the rail and carpet that needs to be aligned with the rail. It is not affixed to anything as far as I can tell so it moves freely. Thankfully it's magnetic so I was able to get a stick magnet under the rail and pull close enough to get another thin Allan wrench into the bolt hole and align it. Now just waiting on the replacement bolt.

As an aside, I haven't found the original bolt, but I have heard a jingling from the passenger footwell when hitting bigger bumps lately. I'm wondering where that bolt could have wound up and how I can retrieve it.

 

Thanks all. There's a small metal receiver under the rail and carpet that needs to be aligned with the rail. It is not affixed to anything as far as I can tell so it moves freely. Thankfully it's magnetic so I was able to get a stick magnet under the rail and pull close enough to get another thin Allan wrench into the bolt hole and align it. Now just waiting on the replacement bolt.

As an aside, I haven't found the original bolt, but I have heard a jingling from the passenger footwell when hitting bigger bumps lately. I'm wondering where that bolt could have wound up and how I can retrieve it.

There are places it could slip under the carpet (below you can see the one washer -passenger front right- trying to hide). Although, when the seat is in place, that would be difficult for it to do.

 

Reason I asked about the backside above I found pieces of a large washer on my 400 see top photo. It turned out to be spacer washer on the upper seat belt bolt so I just whipped up two out of 1/4" ABS plastic.

 

ABS is quite soft and prone to fracture. Nylon or Delvin would be a much better material for this application. Both are available from McMaster Carr in sheet form.