2017 Shimano SLX shifters set for MTB i-beam? BRAND NEW

PAIR of Shimano SLX shifters, new. Price is for pair: prefer to sell together.
Didn't realize that these are not compatible with my mountain bike. I think they're "I-BEAM" or something? Uggh. I have no clue. Anyway, they're brand new shifters, and my LBL said they're no use to me. 10 speed, 10sp, 10s. SL-M670 . The left (front) shifter seems to have a 2 or 3 switch on it? (see photo) Maybe this means it can be used with a double or a triple crankset? Pick up in Toronto or add a few bucks and I'll mail it to you in the USA or Canada or maybe another country. Also happy to deal, if you see my other listings.

I found a website for SL-M670 shifters and it said this:
SHIMANO SL-M670-B-I SHIFTER SET
With I-Spec B mounting, Shimano's SL-670 Shifter set is fit for your Shimano 2/3 X 10 speed drivetrain. The set offers excellent precision and reliability, and includes cables and housing. Set includes a removable optical gear display for maintenance and upkeep, utilizing Dyna-Sys specific cable-pull.

FEATURES
Front: 2/3 speed
Rear: 10 speed
Mounting: I-Spec B

Or are these I-Spec A? I have no idea.