Allamat 27 battery pack

Printing position is on the picture... it is best.
Material for use:

DC 5.5 x 2.1mm or similar.

https://www.aliexpress.com/item/32595463742.html?spm=a2g0o.productlist.0.0.6c7d21fezy06XJ&algo_pvid=de74b200-2781-415d-aae2-459c5ec3f0fa&algo_expid=de74b200-2781-415d-aae2-459c5ec3f0fa-47&btsid=0ab6f82415891026008698345e1f1c&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

https://www.aliexpress.com/item/32950255833.html?spm=a2g0o.productlist.0.0.6c7d21fezy06XJ&algo_pvid=de74b200-2781-415d-aae2-459c5ec3f0fa&algo_expid=de74b200-2781-415d-aae2-459c5ec3f0fa-51&btsid=0ab6f82415891026008698345e1f1c&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

5mm contact bus bar or else similar.

https://www.aliexpress.com/item/33024532775.html?spm=a2g0o.productlist.0.0.36395c0ewwWEpB&algo_pvid=82f3360a-3e05-40ac-93b6-5a61ac6886da&algo_expid=82f3360a-3e05-40ac-93b6-5a61ac6886da-29&btsid=0be3764315891028632025242ebdea&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_