They all only have connections on one side of the unit.
What you are selling IS an alarm/TPMS unit.
If you want to use TPMS you can use either unit, whether you use the alarm unit or not.
If you have only TPMS, you only need the clunky unit, which you don't have. My bike, a 2012 K13S, had TPMS as standard but no alarm so had the chunky TPMS only unit.
If you want an alarm unit AND you have TPMS, you need the unit you are selling. I wanted to have the alarm as well as the TPMS, so I bought the alarm/TPMS unit from a member who was emigrating. In my case it was plug and play.
If you want an alarm unit but don't want/need TPMS, you still need the unit you are selling.
Look at my photographs in the personal mail I sent you. If you haven't seen it check your rubbish bin.
It is worth about £40...
https://www.ebay.co.uk/itm/143869701458The TPMS only unit by itself is worth about £10...
OR £130...
https://www.ebay.co.uk/itm/171315217853...if someone is daft enough.
Seeing as I couldn't find any on ebay in UK, perhaps it is 'worth' more at the moment.
To make it easier for you, I'll give you £5 for the alarm/TPMS unit. Simples! And I'll pay the postage
Brian