2nd div and favoured for relegation it seems. I don't know much about Dalton TBH, but surely Just is better than 3rd Div in Denmark?
Most definitely, but from what it sounds and looks like, they're signing up there with a view to building experience and moving up through the ranks that way. Still only young, but to sign 3 year contracts with the threat of relegation looming is a really big call though. The money on offer must be very good for such signings given their clubs current predicament. They've still got a few games to go though so would definitely be hoping to avoid the drop and have a full crack at the Danish 1st division next season.
Are they eligible to play any of the remaining fixtures in this current season?
They're off to the Under 20's. But...."They are both players I expect to play in our first team next season." Helsingor Club Director.
They can't play this season - the transfer window doesn't open until July so they can't be registered until then - and they're in Poland now anyway.
Helsingør is a club with an interesting recent backstory: https://www.si.com/soccer/2019/01/07/jordan-gardner-american-investor-dundalk-swansea-scandinavia-us-playaers & https://www.forbes.com/sites/robertkidd/2019/03/29/u-s-investors-behind-deal-for-danish-soccer-club-revealed/#46c4074c7b28
I'd note they've got the fourth-best defensive record in the league (yet the worst attacking record), so it's not like it's an absolute mess of a place and if either player shows themselves to be 'too good' for the third tier, you'd reckon they'd attract interest elsewhere in Denmark if nothing else.
That it's better to aim straight, play, and impress than to aim high and potentially not play will be one of the factors that's gone into their decision.