Okay -- my $0.15 worth on tether switches:
I like the Pingel - but have the MPS on the bikes, mostly 'cause they were installed before I knew of Pingel. I like the Pingel 'cause it is easier for the switch to activate in case of a get-off -- from more angles than would (probably) be the case for the MPS. Both do their job fine. I've inspected bikes, though, that had the switch pointing straight up, for instance, and when the owner promised me that it would work in case of the potential get-off -- I asked him to start the motor, which he did, and then yank straight back on the tether cord -- simulating what is likely to be the motion when rider and bike are in the process of going their separate ways. So - he yanked the tether, the switch broke, and the engine kept running. End of demonstration, and an hour or so later he returned to inspection with a switch pointing to the back.
As for where to attach the tether to the rider -- I've got D-rings sewn onto the back of the hand part of my gloves. Since one bike might have the tether switch on the right bar, another on the left -- get D-rings on both gloves. I prefer the glove location to, say, the main zipper pull on the chest of the leathers -- because it's easier for me to see as I'm trying to hook it up to me - in the instance when crew isn't right there, right then, and it's time for me to get to the line. Do what you like -- I'm giving my reasoning as examples.
Back to snow shoveling -- about a foot since suppertime last night.